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      "body": "![](https://steemitimages.com/DQmaR6VUp93m7xF9vmXwUkP6bjkjvpLjUVoeY9YGfiz49wD/image.png)\n1. Đường trung bình động Moving average là gì?\n•\tĐường trung bình Moving average, thường được gọi tắt là đường trung bình MA. \n•\tĐường trung bình MA là cách để làm mượt, hay là làm đơn giản hóa hoạt động biến động của giá theo thời gian, bằng biểu đồ đường đơn giản. \n•\tĐường trung bình MA được tính bằng trung bình giá đóng cửa của các cây nến, trong một khoảng thời gian X tùy chọn.\n•\tMA được sử dụng để hỗ trợ chúng ta tiên đoán giá trong tương lai. Nhìn vào độ dốc của đường trung bình bạn có thể dự đoán giá sẽ biến đổi như thế nào.\nNhư đã nói, đường trung bình làm mượt hoạt động của giá. Có nhiều dạng đường trung bình khác nhau và mỗi loại lại có kiểu “làm lượt” của riêng mình. Một cách tổng quan, đường trung bình càng mượt thì nó càng phản ứng chậm với giá hơn. Một đường trung bình nhiều biến động hơn thì nó sẽ phản ứng nhanh hơn với những thay đổi của giá. Để làm cho đường trung bình mượt hơn, bạn cần lấy trị số trung bình của giá ở số kỳ thời gian nhiều hơn.\nĐường trung bình động MA có 2 dạng chính thường được sử dụng:\n1.\tĐường trung bình đơn giản – Simple Moving Average (SMA)\n2.\tĐường trung bình lũy thừa – Exponential Moving Average (EMA)\n2. Simple Moving Average (SMA)\nSimple Moving Average, viết tắt là đường SMA, là kiểu đường trung bình đơn giản nhất, được tính bằng trung bình cộng giá đóng cửa của các cây nến.\nVí dụ: nếu vẽ đường trung bình SMA cho số cây nến là 10, thì chúng ta cộng lại giá đóng cửa của 10 cây nến gần nhất và chia cho 10. Cứ liên tiếp như vậy, chúng ta sẽ có được 1 đường SMA.\n![](https://steemitimages.com/DQmdKvdJQk7hSmczVtFtyDSmjWu2zJnkNkL2z1t5LSfU3UK/image.png)\nNhư hầu hết các công cụ chỉ báo (indicator) khác, MA cũng có tính trễ, bởi vì MA dùng để tính mức trung bình của giá trong quá khứ nên MA chỉ giúp bạn thấy hướng đi tổng quan của giai đoạn giá đã qua. Việc của bạn là nghiên cứu và phát hiện xem dữ liệu quá khứ này sẽ phản ánh điều gì về tương lại.\nBiểu đồ minh họa này là ví dụ về việc đường SMA làm mượt giá như thế nào:\n-\tTrong biểu đồ, chúng ta đặt 3 đường SMA khác nhau, là SMA5, SMA30 và SMA62. Như bạn đã thấy, đường SMA với số cây nến trung bình càng lớn, thì nó sẽ càng mượt và càng biến động chậm hơn so với giá thị trường. Đường SMA62 cách xa đường giá hơn so với SMA30 và SMA5.\n-\tĐiều này bởi vì SMA62 là trung bình cộng giá đóng cửa của 62 cây nến trước, số cây nến càng nhiều thì SMA càng phản ứng chậm so với giá.\n![](https://steemitimages.com/DQmVT2k63X2GXiayL87zm21jnwdV92WyYgSt4zd6BeA24vW/image.png)\nChúng ta hãy xem ví dụ bên cạnh với đường SMA 5.\nVà giá đóng cửa của 5 cây nến này là:\nNến 1: 1.3172\nNến 2: 1.3231\nNến 3: 1.3164\nNến 4: 1.3186\nNến 5: 1.3293\nVà chúng ta tính ra SMA như sau:\n(1.3172 + 1.3231 + 1.3164 + 1.3186 + 1.3293) / 5 = 1.3209\n![](https://steemitimages.com/DQmWzv7M2VErwSSos7tAzMcaXDnoBAhZhpLcGaN12Y8j6bS/image.png)\nNhưng giả sử, trong cây nến thứ 2, có 1 yếu tố gì đó, khiến giá rớt xuống là 1.3000 chứ không phải là 1.3231 như ở trên. Thì khi đó SMA được tính là: (1.3172 + 1.3000 + 1.3164 + 1.3186 + 1.3293) / 5 = 1.3163\nTÓM TẮT:\n•\tMột đừơng trung bình là cách làm phẳng hoạt động giá cả\n•\tCó nhiều kiểu đường trung bình. Hai kiểu thông dụng nhất là SMA và EMA\n•\tSMA là dạng đường trung bình đơn giản nhất, nhưng dễ bị ảnh hưởng (tổn thương) đối với các xung nhọn.\n•\tBiết được những người giao dịch hiện đang làm gì quan trọng hơn là biết họ đã làm gì tuần qua hoặc tháng qua.\n•\tCác đường SMA phẳng hơn so với các đường EMA\n•\tCác đường trung bình với số khoảng thời gian dài hơn thì phẳng hơn so với số khoảng thời gian ngắn\n•\tCác đường trung bình nhấp nhô thì phản ánh hoạt động giá nhanh hơn và có thể nắm bắt các xu hướng sớm. Tuy nhiên, bởi vì chúng phản ánh nhanh nên chúng có thể dễ bị ảnh hưởng đối với các xung và có thể đánh lừa bạn.\n•\tCác đường trung bình phẳng phản ánh hoạt động giá chậm hơn nhưng sẽ giúp bạn tránh các xung và không sai lầm. Tuy nhiên, bởi vì chúng phản ánh chậm nên có thể làm bạn giao dịch chậm và bỏ lỡ các cơ hội tốt.\n•\tCách tốt nhất để sử dụng các đường trung bình là vẽ nhiều kiểu khác nhau trên một đồ thị để bạn có thể thấy cả biến đổi theo khoảng thời gian dài và biến đổi theo khoảng thời gian ngắn. \n3. Sử dụng đường trung bình động để xác định xu hướng\nCách thường dùng nhất đối với đường trung bình động là giúp bạn xem xu hướng. Để làm việc này, bạn chỉ cần mở 1 đường trung bình động lên biểu đồ, khi đường MA hướng lên, và giá nằm trên đường trung bình động thì đó là dấu hiệu xu hướng tăng và ngược lại.\n![](https://steemitimages.com/DQmTXCsL9qUQfvVHtcMPZa7UmXPSxZBftkJUcVDHi5PSSFu/image.png)\n![](https://steemitimages.com/DQmY2RyiJusdxMq8dXgmMpfcU5ET2netDmLBE8aFejMgA1C/image.png)\n![](https://steemitimages.com/DQmVsg9RvenxHU5TpQk7wr8oEadBf1Jupas99fy3A1PiyJW/image.png)\n![](https://steemitimages.com/DQmWbrDBxjN6cAGCDwyRn68R18NmRSvCSLmmWfiqyBuugKi/image.png)\n4. Giao dịch tại điểm giao cắt của các đường Trung Bình\n![](https://steemitimages.com/DQmbkd7cmr9orrqX8RNtmY4KdWQRp18T2GiWimXR4V6Y5GN/image.png)\nĐƯỜNG TRUNG BÌNH LŨY THỪA EMA\n![](https://steemitimages.com/DQmWvHNiejZAAYHqiNKS3mh2psNHuA1XQCWvkhHgz9wDtga/image.png)\nHỖ TRỢ VÀ KHÁNG CỰ ĐỘNG\n![](https://steemitimages.com/DQmNR5ewq5rgtx5sLzQdnBbuyrNs7x1rV9y5ShiRtgyWmZq/image.png)\n![](https://steemitimages.com/DQmSsRCKmuy4y2kdutaEX1VUYPZxump1ox1DhwRRETynFdd/image.png)\n![](https://steemitimages.com/DQmXJD3FLaGdfHhAefBheybeLvnMPpZccEcfdRYuPBHmCAg/image.png)",
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      "body": "What is Ethereum Gas? - is the lifeblood of the Ethereum ecosystem, and can not be loaded. Gas is a unit of measurement that calculates the cost that it will need to perform certain operations.\n* What is a smart contract?\nWhat is GAS? How to buy GAS\n![](https://steemitimages.com/DQmXJnPnYZE5FnMNm44sh1CUKWB8A6GgMSfhi3AqvKw2prU/image.png)\nEach activity that participates in Ethereum, can be a simple transaction, or a smart deal, or even an ICO will consume a certain amount of gas. Gas is the unit used to calculate the cost that needs to be paid for the network to perform an operation.\nIn this tutorial, we will explain to you how gas works. But before we do that, there are some concepts that we have to learn. So let's start exploring more deeply about Ethereum Gas.\nSo, what would this transaction be like if it had happened in the Ethereum network?\nSuppose you want to buy something from a vending machine in the Ethereum network, how will this step be?\nStep 1: You give the vending machine some money and this is recorded by all the nodes in the ethereum network and the transaction is updated in the ledger.\nStep 2: You click the node corresponding to the item you want and the request will be updated in the Ethereum and ledger.\nStep 3: The thing you want to buy is given and you take it and this is recorded by all the nodes and ledgers.\nEvery transaction you make through smart contracts will be recorded and updated by the network. This makes everyone involved in the contract responsible for their actions. Make people no longer angry by making every action visible to the entire network.\nWhat is Virtual Ethereal Machine?\nBefore we understand the Ethereal Virtual Machine (EVM), we must understand why it is necessary to have a \"virtual machine\".\nSo, come back with a smart contract.\nWhat are the desired attributes that we need in a smart contract?\nAnything running on a blockchain needs to be invariant and must be able to run across multiple nodes without compromising its integrity. Therefore, the smart contract function should have three things:\nDetermined.\nCan be changed\nIsolated.\nFeature # 1: Identify\nA program is defined if it outputs the same output for each input of a given input. For example. If 3 + 1 = 4 then 3 + 1 will ALWAYS produce the result 4 (assuming the same basis). So when a program provides the same output for the same set of inputs in different computers, the program is called 'defined'.\nThere are times when a program can act in an indefinite fashion:\nCall unknown functions in the system: When a programmer calls an undefined function in their program.\nUnknown data source: If a program collects data at runtime and an unknown data source, the program will become undefined. For example. Let's say a program collects 10 searches on Google for a particular query. The list may continue to change.\nDynamic calls: When a program invokes a second program it is called a dynamic call. Because call targets are defined only in the implementation process, not defined in nature.\nFeature # 2: Can be changed\nIn mathematical logic, we have an error called \"stop the problem\". Basically, it means, we can not know whether a certain program can perform its function within a time limit. In 1936, Alan Turing deduced, using Cantor's Diagonal problem, that there was no way to know whether a given program could be completed within a time limit.\nThis is clearly a problem for smart contracts because by definition contracts must be able to end within a certain period of time. There are a number of measures taken to ensure there is a way to \"kill\" the contract from the outside and prevent it from participating in an endless loop as this will cause the loss of resources:\nTuring Incompleteness: A Turing Incomplete blockchain will have limited functionality and is unlikely to perform jump and / or loop operations. Therefore they can not participate in an endless loop.\nStep and Clock: A program can simply track the number of \"steps\" it has taken, ie the number of instructions it has given, and then terminate when a particular step has been taken. present. Another method is clock charging. The contracts are made with a prepaid fee. Each order requires a specific fee. If the cost exceeds the prepaid fee, the contract will be terminated.\nTimer: This is a pre-defined timer that is stored. If the performance of the contract exceeds the deadline, the contract will be canceled from the outside.\nFeature # 3: Isolated\nIn a blockchain, anyone can upload a smart contract. So that contracts may accidentally contain viruses and errors.\nIf the contract is not isolated, this can impede the whole system. Therefore, it is important that a contract be segregated in a sandbox to save the whole ecosystem from all negative influences.\nNow that we know what these features are, it's important to know how they are implemented. Typically, smart contracts are run using one of two systems:\nWhat is Ethereum Gas: Specific Guidelines\nBitcoin was created to answer two questions that everyone has asked themselves.\nIs it possible to create a transfer of money between two people without intermediaries?\nIs it possible to create a decentralized amount that can work on something like blockchain?\nSatoshi Nakamoto answered these questions when he created Bitcoin. Finally, we have a decentralized currency system that transfers money from one person to another.\nHowever, there is a problem with bitcoin and also the problem of all first generation blockchain: Users are only allowed to perform currency transactions, can not add conditions for those transactions.\nAlice can send Bob 5 BTC, but she can not impose conditions on those transactions. For example. She can not tell Bob that he will receive the money only when he does some work.\nThese conditions will require extremely complex scenarios. Something to record the requirements and make the process of receiving money more seamless.\n... and \"something\" is the smart deal.\nWhat is a smart contract?\nSmart contracts help you exchange money, assets, shares, or anything of value by being transparent, without conflict, and avoiding services from a broker.\nVitalik Buterin's Ethereum standard is very easy in this generation. They show the world how blockchain can evolve from a simple payment mechanism to something far more meaningful and powerful.\nSo what are these \"smart contracts\" and what is the problem here?\nA smart contract is an automatic contract. They operate with specific instructions written in their code, recording certain conditions that must be fulfilled.\nSmart contracts are the way things are done in the Ethereum ecosystem. When someone wants to have a special job done in Ethereum, they start a smart contract with one or more people.\nIntelligent contracts are a series of instructions, written in the \"solidity\" programming language, based on IFTTT logic, or IF-THIS-THEN-THAT logic. Basically, if the first instructions are done, then perform the next and subsequent functions then and repeated until you finish the contract.\nThe best way to understand that is by imagining how a vending machine works. Each and every step you take acts as a trigger for the next step for it to function. It's like a domino effect. So, check out the steps you'll take when interacting with vending machines:\nStep 1: Put some money into the vending machine.\nStep 2: Click the button corresponding to the type of beverage you want to buy.\nStep 3: This type of drink appears and you take it out of the machine.\nNow look at all the steps and think about it. Are you going to step one step further? Each step is directly related to the previous step. There is another factor to consider, and that is an integral part of the smart deal. You see, in your entire interaction with the vending machine, you (the requester) only work with the machine (service provider). There is absolutely no third party.\nVirtual machines: used by Ethereum.\nDocker: Used by Fabric.\nLet's compare these two and determine what makes a better ecosystem. For simplicity, we will compare Ethereum (virtual machine) with Fabric (Docker).\nVirtual machines provide better identification, changeability, and an isolation environment for smart contracts. However, the docker has a distinct advantage. They provide code language flexibility while in VMs like Ethereum, one needs to learn a whole new language (solidity) to create a smart contract.\nEVM is the Etherex virtual machine, in which all smart contracts operate in Ethereum. This is a simple 256-bit Turing Complete virtual machine. Turing Complete means providing resources and memory, any program implemented in EVM can solve any problem.\nWhat is Ethereum Gas?\nAs explained in the introduction, Gas is a unit of measurement used to calculate the cost that it will need to perform certain activities.\nAll smart contracts running in EVM are encrypted using solidity (Ethereum is planning to move to Viper in the future). Each and every line of code will certainly require a certain amount of gas to calculate.\nThe image below has been taken from the Ethereum Yellowpage and can be used to get a glimpse of what the price of gas can be, from which to plan wisely for your smart deal.\nTo better understand the behavior of gas in Ethereum, let's use a comparison. Suppose you are going on the road. Before doing so, you must do the following:\nYou go to the gas station and specify the amount of gas you want to pump into the car.\nYou have gasoline in your car.\nYou have to pay the amount of gas you bought.\nNow, similarly, let us think of Ethereum.\nThe car, is the activity you want to perform, such as a gas contract or a smart contract.\nGasoline is gas.\nGas station is your miners.\nThe amount you pay for them is the mining fee.\nAll activities that users want to perform in the ethereum must provide gas for the following:\nTo cover its data is also known as the internal charge.\nTo cover its entire cost.\nNow that we have mentioned the basics, you can ask the following questions.\nWhy Do We Have Gas Systems?\nThe answer is simple ... is to encourage.\nLike any other peer-to-peer system, Ethereum is heavily dependent on miners. As more miners, the system will have more and more hashrate, safe and faster.\nIn order to attract more miners into the system, they need to make the system seem like it can be profitable to attract them. In Ethereum, there are two ways in which miners can make money:\nBy exploiting blocks and getting bonus blocks.\nBy becoming temporary dictators of their exploit blocks.\nLet's explore the second point.\nMiners are responsible for placing transactions in blocks. To do that, they have to use computational power to verify the contract intelligently. The gas system allows them to charge a certain fee to do so.\nThis fee is called the coin worker's fee and it helps to encourage them to continue to participate actively in the ecosystem.\nSo, how much can they charge? Before we can calculate, let's understand how to measure the gas.\nThe smallest measure of gas is the wei. So if we spend 1 unit of gas in operation, we call it a wei.\nUnits of measurement will increase as follows.\nSo, how do we convert gas into an Ether?\nWithout a fixed conversion price, it is entirely up to the operator to determine the conversion price, however, the average conversion rate is: 1 gas = 0.02 micro Ether.\nThe following chart shows the average Ethereum gas price chart.\nBefore we go any further, it is important to know the Gas Limit concept.\nWhat is Ethereum Gas Limit?\nTo obtain an activity performed at Ethereum, the creator of the activity (i.e. the originator of the transaction or the creator of the smart contract) must specify a limit before sending it to the miner. Once a gas limit has been determined, then the new miner is allowed to begin performing the activity.\nWhen submitting a gas limit, consider the following:\nDifferent activities will have different gas costs (as described above).\nThe miners will stop running as soon as the gas runs out.\nIf there is any leftover gas, it will be returned to the server immediately.\nTake a look at how this works in a hypothetical scenario.\nLet's say we add two numbers and assume that the contract must do the following:\nStore 10 variables. Suppose this activity costs 45 wei gas.\nAdd two variables, assuming this cost is 10 wei gas.\nRecording the results, this cost 45 usi gas.\nSuppose the gas limit is 120 wei.\nTotal gas used by the operator is (45 + 10 + 45) 100 wei.\nThe fees paid to them with the assumption of 1 wei worth 0.02 micro ETH (100 * 0.02 micro ETH) = 0.000002 ETH.\nNow how much gas is left?\n120 - 100 = 20 wei.\n20 wei is returned to the server.\nSo, once that has been determined, there are two scenarios that one has to consider:\nGas Limit is too low.\nGas Limit is too high.\nScenario 1: Gas Limit is too low\nIf an operation runs out of gas, then it will return to its original state as nothing really happens, however, the server still has to pay the miners fees for their computing costs and Activities will be added to the blockchain (even if it has not been completed).\nGo back to your trip, if you do not have enough gasoline in your car, you will not be able to reach the destination, you paid the owner who pumped gasoline for you and then get back or not?\nLet's see how this works in our hypothetical hypothetical contract. This step is:\nStore 10 variables. Suppose this activity costs 45 wei gas.\nAdd 2 variables, assuming this cost is 10 wei gas.\nRecording the results, this cost 45 usi gas.\nHowever, this time, Gas Limit is 90 wei.\nNow, we know that the gas needed to make the contract is 100 wei, but we only have a gas limit of 90 wei.\nIn this case, the miner will calculate what the 90 wei can do and the operating cost of the 90 wei will be (90 * 0.02 micro ETH) 0.000018 ETH.\nIn addition, the contract will return to its original state and be added to the blockchain.\nScenario 2: Gas Limit is too high\nSo, if we set Gas Limit too high?\nIs this more reasonable? After all that left over is returned to the server right?\nThat sounds good on paper but it does not really work in practice.\nThe miner was limited to 6,700,000 gas limits per block. Every simple transaction in Ethereum usually has a gas limit of 21,000. Miners can only add activities worth less than or equal to the gas limit of the block.\nSuppose a transaction A has a gas limit of 42,000 and two transactions B and C have a normal limit of 21,000.\nWhich option is better for a miner putting on their block?\nWill they put into transaction A and return a large amount of gas?\nOr would they put the B and C deals and get a little refund for not returning anything?\nThe second thing is more economical for them?\nThis is the reason why having a large gas limit is not the right way.\nHere is the average gas limit graph.\nHigh and Low Gas vs High and Low Charges\nIt is important to understand that so far gas and ether are not the same thing. Gas is the unit of calculations needed while ether is the price or can be understood as the charge that we pay for that gas.\nNow with the knowledge of everything that we have known so far, let's look at gas and charge scenarios.\nIf a gas activity is LOW, then the miners will not even take it because it does not have enough gas to complete the calculation process.\nIf a low-cost operation, then it may still have enough gas to cover but the miners will not be profiting at the bits to receive it because of a low-cost operation for them, Not a viable activity.\nIf a gas activity is HIGH, it means that the operation will be cumbersome with a high limit gas and therefore the miners will not receive it.\nIf an operation has a high cost, then the miners know that they will earn a lot of money from it and it will be picked up immediately.\nDifferent deals have different gas prices, according to the ethgasstation station:\nWhat's going on in the gas return scenario?\nIn 'solidity', there are two commands that ensure that you receive a refundable amount of gas.\nSUICIDE: This cleans the smart contract basically. This will help you recover 24,000 gas.\nSSTORE: Clear archives, get you 15,000 back.\nSo, if your contract is using up to 14,000 gas and cleared in the repossessions, you may be able to get back (15,000-14,000) 1,000 gas that will be refunded to you?\nIt's not so simple.\nIf that is the case, then the miners will lose all motivation. After all, the miners should not pay you to make the calculations right?\nTo avoid such scenarios, a condition has been introduced\nRefunds can not exceed half the amount of gas used in the calculation.\nLet's take an example to clarify this.\nSuppose we have a smart contract that uses up to 14,000 gas.\nThe gas limit that we set up is 20,000 gas.\nThe smart contract also includes an SSTORAGE order.\nSo how much gas will make the contract come back after the calculation?\nFirst, they will get (20,000-14,000) 6,000 units of unused gas.\nNow, the SSTORAGE command has also been used, so theoretically they will be able to get 15,000 gas again.\nHowever, the amount of gas used in the contract is 14,000 and because of 15,000> 14,000 / 2, the REPAYMENT AMOUNT will be 14,000 / 2 = 7,000.\nTherefore, the total amount of gas that the creators get back is 6000 + 7000 = 13,000.\nLet's take another example.\nSuppose this time the contract uses 70,000 gas and it includes a SUICIDE function.\nA SUICIDE function will pay you 24,000 gas <70,000 / 2.\nIn this case, the amount of gas to be repaid will be 24,000 + unused gas.\nCriticism of Ethereum Gas. Is it reasonable?\nAlthough the gas system has received praise for offering a smooth operating mechanism that still encourages miners to work hard, it has recently been criticized for being too expensive. red for developers and smart contract creators.\nAbout this, Danny Ryan has done some interesting research in his article.\nConsider the following scenario:\nWhen two numbers are added one million times in Ethereum, the cost will be $ 26.55.\nDanny Ryan compares it with a standard AWS system. He said he could add two numbers a million times using python in 0.04 seconds, followed by $ 0.0059 Amazon Kindle hours with an exchange rate of $ 0.000000066.\nThis means that the calculation in Ethereum is more expensive 400 million times!\nBased on his research, this is the conclusion:\nTo be fair, adding a couple of million times is a bit artificial. A good written contract is likely to perform more sophisticated off-chain calculations and will have to deal more with updating the contract. Storage of large amounts of data into blockchain is not a simple task. Depending on the task, the user can store a cryptographic reference (a hash) of data on the string and hold the remainder of the off-chain data.\nThat suggests that we as developers should be aware of these costs, and design the dApp accordingly. We need to find a balance between chain and off-chain complexity, while leveraging the blockchain's ability to delegate. \"\nsource: st",
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      "body": "1. WHAT IS THE JAPANESE CHART?\n\nWhat is a candlestick chart?\nIt is a tool used in ancient times used by the Japanese to trade rice\nSteve Nison discovered this secret when working with brokerage firms in Japan. He further researched and later wrote books on this technique and disseminated it in the West. This technique became popular in the 1990s. What is a candle chart?\nThe picture below will be clearer\nCandlestick charts can be used on any time frame, either 1 day, 1 hour, 30 minutes - whatever time frame you want. A candlestick chart is used to describe the price action within the time frame we have chosen\nCandlestick charts are formed from the opening, highest, lowest and\nclosure of selected period period\n• If the closing price is above the opening price, the market is represented by a rising candle (the example is white candles)\n• If the closing price is below the opening price, the market is represented by a candle (the example is black candlestick).\n• White body or black body is called \"real body or body\"\n• The outer part of the upper and lower body is called the \"shadow ball\"\n• On top of the upper shadow is the highest price\n• Bottom of the lower shadow is the lowest price\n![](https://steemitimages.com/DQma9F1H8TBR9Xup1rv2nhbdWv76kBdxjVNvEC26LhiNf6E/image.png)\n2. CANDLES AND CANDLES\nCandlestick\nLike human beings, candlestick charts come in different sizes. For example, the long candlestick represents a strong buying or selling force. The longer the body, the stronger the buying and selling force. This means that the buy or sell side is controlling the market at the moment. Meanwhile, the short candle represents a weak buy-sell.\nCandles:\nThe upper and lower shadow of the candle showed signs of trading\nCandlesticks showed high prices during the session, while the shadow below shows low prices\nCandlesticks with long shadows showed much volatility, out of open price and closed\nIf a candle has a long upper shadow and a shorter candlestick, it indicates that the buying side has tried to push it higher but for some reason the sellers have jumped in and pushed the price down again, door closer to the opening price\nIf a candle has a long lower shadow and shorter shadows, it shows the sellers controlling the market and pushes the price down but for some reason the buying side has jumped and pushed the price up again, causing Closing price close to opening price\n![](https://steemitimages.com/DQmTmNLs6eR5WNkEjQinRLJje37xmLsPHnWbi3E6BHGKM1P/image.png)\n![](https://steemitimages.com/DQmYtA35fmKXRkKNmJv2nX6VU6JfRWK29j8q6KvoFbpeVq2/image.png)\n3.3 BASIC BASIC TYPE OF USE\n* Spinning Tops - Spinning Tops\nCandlestick pattern with upper and lower shadow, small body is called Spinning\nTops. The color of the body does not matter\nThis model demonstrates that no decision has been made between the buy and sell side\n![](https://steemitimages.com/DQmcUyLvETdwTGw738s48EGJytiwUqKBQouUXcP8S2KsKmz/image.png)\nThe small candlestick shows small volatility from the opening price to the closing price, while the candlestick shows that both the buy side and the sell side have struggled with each other but neither side wins.\nEven when the market opened and closed with little change in price, in fact the price has fluctuated sharply in this session. Neither side buys and sells side gains the advantage, so the result is that the two sides look like a tie. If the spinning model appears in the downtrend, it may indicate that not many people want to sell to push prices down. Again, the possibility of a reversal could occur. If the spinning pattern appears in an uptrend, it may indicate that there are not many more people willing to buy to push up the price again and the possibility of a reversal reverses. Possible Marubozu Candles Mazuboru is a candle without candles that only long candles, that is the candle only open price and closing price. At this point, the opening and closing prices are equal to the highest or lowest prices.\nTwo types of Marubozu can be seen below:\n![](https://steemitimages.com/DQmbxDnENuTsq89CNu7rUC5y1FCT7zg4Hd3L23dCuWPCdpH/image.png)\n* Mazuboru rose (white candlestick) did not have the shadow on the lower shadow because the opening price was the same as the lowest price, while closing price was the same as the highest price. This is a bullish candle pattern, showing the buy side has completely controlled the session. It is usually the first sign of a price rally or a sign of a reversal from falling to rising\n* Mazuboru dropped (shadow black body) without the shadow on the lower price because the opening price was the same as the highest price, the closing price was the same as the lowest price. This is a strong bearish candle, showing the sell side has completely controlled the trading session. It is usually the first sign of further price declines or signs of a reversal from rising to falling\n* The Doji candlestick pattern is a candlestick pattern where the closing price and the opening price are the same or nearly the same, ie the candlestick will be very small, just as a thin line if you look at the chart.\nThe Doji candlestick pattern shows indecision or the struggle between the buying and selling sides (somewhat similar to Spinning Tops). Prices moved up and down during the session but closed very close to the open\nNeither side of the buy and sell side can take control, and the result is mutual harmony, which results in Doji candles.\nThere are 4 kinds of special Doji candles. The length of the different upper and lower shadows and the resulting doji candle may look like a cross or a reverse crossbow ... There are some models below as follows:\n![](https://steemitimages.com/DQmfWhdnNzPHXQRb3LABNJWJPattjdeU9NN8qwJQUNZPydg/image.png)\nWhen a doji candle appears, you need to pay particular attention to the previous candle.\nIf a Doji tree appears after a series of rising candles with long body candles (like Marubozu candles), the sign that the doji bring may be the weak and weaker side. As prices continue to rise, more buyers are needed, but it seems that no one else is. The sellers are jumping in and are likely to push prices down\n![](https://steemitimages.com/DQmZwmUCPvwReJYGKbPuREfibqHo83eJbwQbkutqg7MVX9b/image.png)\nIf a Doji tree appears after a series of falling candles with long body candles (like Marubozu candles), the sign that the doji bring may be the weak and weak sellers. As prices continue to fall, more sellers are needed, but there seems to be no more. Buyers are jumping in and are likely to push up prices\n![](https://steemitimages.com/DQmUh834Mjjyi7sKuZ794BYAMMYvzmgkGMCT4xQ82v7Lwto/image.png)\nWhile the decline has slowed down by the lack of support for the side, the side need to show strength by confirming the reversal. A rising candle with a closing price above the opening price of a previous candle will be a reversal.\n4. CANDLES MODEL 1 CANDLES\nHammer and Hanging Man\nThese two models look exactly the same, but actually it is different based on the previous price movements. Both models have small bodies, long lower shadows, very short shadows or almost nonexistent.\n![](https://steemitimages.com/DQmTzfepipgmmMN9BYStYzLHwXr9BHqqjYW8EsgrUJffhH3/image.png)\nHammer-hammer model - is a bullish reversal pattern, occurring in a downward trend. This candlestick pattern looks very much like a nailed hammer with the handle below it.\nWhen prices are falling, the hammer candle pattern shows that the bottom is approaching and the price may rise again. The long lower candle indicates that the sellers have pushed prices lower but the buyers have been able to resist the selling pressure and push the price up again, making the price close to the opening price. The hammer in a downward trend that you place a buy order is a mistake. You need more signals to confirm the increase before you place the order\n![](https://steemitimages.com/DQmUj7qyT7XUiBaoD8NySMpgTDdqg9zw7DSGgAjh1tgs915/image.png)\nAn example of a security confirmation is that you can wait for a candle to rise again after the Candle Tree pattern. Identification Condition:\n- A candle with 2-3 times the length of the tail\n- The ball is small or not\n- Body on the top of the tree\n- The color of the body does not matter\n\nHanging man pattern - a reversal pattern of falling candles, usually appearing at the top of a rising trend or in a strong resistance zone. When prices are rising, the Hanging Man pattern appears, suggesting that the sellers are starting to jump in and out of the buy side.\nThe long shadow showed that the sellers pushed prices down during the trading session. Buyers pushed prices back up but prices pushed up just near the open price session\nThis warned that the buyout was no longer enough to keep up momentum. Condition of identification:\n- A candle with a lower shadow is about 2-3 times longer than a candle\n- The ball is small or not\n- The candlestick is located at the top of the candle\n- The color of the body is not important, but if the black body (candle drops), the ability to decrease will be stronger than white body (candle increase)\nInverted Hammer and Shooting\nStar).\nThese two models look similar. The only resistance between them is the one in the down trend and one in the up trend. These two types of candles have small bodies, long upper shadows and almost or no shadows\n![](https://steemitimages.com/DQmeW46NEnWNvMcpwHPUp866aUCADa5uuAMZ6vMyrdsGLzM/image.png)\n![](https://steemitimages.com/DQmVGtMU7bygs2FoXnM3YzQEPZmucdd7y7LgixRzXrRekiF/image.png)\nInverted hammer pattern occurs when the price is declining, indicating the possibility of a reversal. Its long shadow shows the buying side trying to push up prices. Meanwhile, sellers are still selling pressure\n\nFortunately, the buy side is still strong enough to keep the price close to the opening price, ie the price can not continue to fall as the previous trend.\nThis shows that when the sellers are no longer able to push prices down means that who wants to sell is already sold out and the market no one wants.\nsell again. If no one wants to sell anymore, who will? The answer is buy phe\n\nThe Shooting Star model is a reversal pattern with the same structure as the reverse hammer, but it appears when prices are rising. This indicates that the sellers are beginning to prevail against the buy side in the uptrend and prices may fall back.\n5. CLASS 2 MODEL\nCandlestick Patterns - A bullish pairing pattern is a pair of candles that signals a price increase. This pattern occurs when a falling candle occurs, but immediately after that a very large candle. The rising candle after \"completely submerged\" the candle down front. This means that the buy side has decided to push up prices after a period of downtrend or sideways.\nIn addition, the pattern of sinking - bearish engul fi ng pattern - in contrast to the model of submergence. A falling pattern occurs when a rising candlestick is followed by a large drop, which completely engulfs the previous candle. This means that the sellers have taken full control and a sharp decline may occur\nDouble Top (also known as Tweezer Top) and Double Tweezer (Tweezer Bottom)\nDouble bottom double pattern is the reverse pair pattern. This pattern usually occurs after a rise or fall, indicating the possibility of reversing prices. Looking at this model is like tweezers with two equal rods\n\nThe double bottom - effective double bottom model has the following characteristics:\n• The first candle in this pattern is in the direction of the price trend going. If prices are rising this will be an upside candle\n• The next candle will go against the price trend. If prices are rising then this will be a down candle\n• The candles of these two candles must be equal in length. Tweezer tops have the same shade. Double bottom (tweezer bottoms) have the same shadow\n![](https://steemitimages.com/DQmZWt3VLQz2oiPpjygk9wKzp1uThnqA9BnCsJWzuF2YAzA/image.png)\n![](https://steemitimages.com/DQmZRtuWrhnsxxHfBGaNQ7Wv5VeGUk8o7hyRUas4xJtLtTy/image.png)\n6. CLASS 3 MODEL\nMorning Star and Morning Star pattern are the three candlestick patterns that you often encounter at the end of a trend. These are the reversible models that you can identify through the description below (describing an example of an afternoon star model):\n![](https://steemitimages.com/DQmSTAUKgiA7XPWVrgfb8Py7RrYgLQ9DWaPf4EhqH7sZqmq/image.png)\n1. The first candle in the three candlesticks is a candle, because the current trend is bullish\n2. The second candle is a small body, indicating that the market may be hesitant. This small candlestick may be an up or down candle 3. The third candle is a candle that confirms a trend reversal, so it will be a candle. The characteristic of this candlestick is that its closing price is below the mid point of the first candle\n(similar to the Morning Star model)\nThree White Soldiers - Three Black Crows\n![](https://steemitimages.com/DQmRvUbY2GVMSgjhues1rxnNNicL7LJAqdPA653QgWpoNvT/image.png)\nThe pattern of 3 male soldiers is a pattern of three candlesticks rising in a downtrend, indicating a reversal occurred. This is one of the strongest models, especially if it appears after a long downtrend and a short sideways. The first candle in this cluster is considered a reversal candle. It shows that the downtrend or the sideways trend is over\nFor this pattern to continue, the next candle will be larger than the previous one on the candlestick. In addition, this second candle will have a closing price close to its highest price, ie it will almost or not have the upper shadow\nThe pattern of 3 soldier soldiers will complete when the last candle completes with almost the same size as the second candle. The candle will also have small balls or no candles.\nThe pattern of three crows is the opposite of the model of three soldiers. This pattern consists of three falling candles in an uptrend, showing a reversal.\nSimilarly, this model will have the first candlestick is candlestick, the second candlestick will be larger than candlestick 1 and almost or no candlestick. Finally, the third candlestick will be about the same size as candle 2, and also almost or without shadows\n6. CLASS 3 MODEL\nThree Inside Up - Three Inside Down\n\nBecause I can not find the Vietnamese equivalent, I keep the English name for these two candlestick models\nThe Three Inside Up pattern is a reversal pattern that usually appears at the end of the downtrend. It shows that the downtrend could be over and the uptrend has started. For a proper three inside up, note the following:\nThe first candlestick is usually at the bottom of the downtrend, showing a picture of a long falling candle. 2. The second candle is a rising candle, touching the middle of the previous falling candlestick.\n3 The third candle needs to be closed above the first candle to determine that the buy side has strengthened and breaks the downward trend.\nIn contrast, the Three Inside Down model will be at the bottom of the uptrend. It shows that the uptrend may have ended and the downtrend started. The description of the Three Inside Down model is exactly the opposite of the description of the Three Inside Up model\n![](https://steemitimages.com/DQmZHyL7YCzoBaVzp91K2dpn31xJwCnFZbhNNkqHc6ak2HG/image.png)\nThe Three Inside Up pattern is a reversal pattern that usually appears at the end of the downtrend. It shows that the downtrend could be over and the uptrend has started. For a proper three inside up, note the following:\n1. The first candle is usually at the bottom of the downtrend, reflected in the image of a long falling candle\n2. The second candle is a rising candle, touching the middle part of the previous candle\n3. The third candle needs to be closed above the first candle to determine that the buy side is strong and breaks the downward trend.\nIn contrast, the Three Inside Down model will be at the bottom of the uptrend. It shows that the uptrend may have ended and the downtrend started. The description of the Three Inside Down model is exactly the opposite of the description of the Three Inside Up model",
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