Learn how to create an MQL5 expert advisor to calculate and display historical profit for a specific currency pair. This tutorial uses the Trade.mqh library and demonstrates the process in MetaTrader's strategy tester.
In this MQL5 tutorial, we will delve into the process of creating an expert advisor that calculates and displays the historical profit for a specific currency pair. The tutorial utilizes the Trade.mqh library, which offers essential functions and methods for executing trade operations within the MetaTrader platform. Here, we will outline the key steps and concepts involved in this tutorial
Introduction The video tutorial is titled "MQL5 TUTORIAL - HOW TO CALCULATE THE HISTORY PROFIT." It introduces the viewer to the objective of creating an expert advisor to calculate historical profit for a currency pair.
Accessing MetaEditor The tutorial begins by instructing users to open MetaEditor by either clicking on the provided icon or pressing F4 on their keyboard. MetaEditor is the integrated development environment for creating custom indicators, expert advisors, and scripts in MQL5.
Including Trade.mqh Library Within the MQL5 code, the first step involves including the Trade.mqh library. This library is essential as it provides functions and methods required for performing trade operations within MetaTrader.
Creating a Trade Instance An instance of the CTrade class, named 'trade,' is created. This instance is used to execute trade operations such as buying and selling.
OnTick Function The OnTick function is implemented to calculate the current Ask and Bid prices for the currency pair. These prices are crucial for executing buy and sell orders.
Executing Buy and Sell Orders The code checks whether there are fewer than two open positions. If this condition is met, it proceeds to execute both a buy and a sell order. It's important to note that this is primarily for demonstration purposes.
Calculating Historical Profit The core objective of this tutorial is to calculate the historical profit for the specific currency pair. This is achieved using the 'GetCurrencyPairHistoryProfit' function, and the result is then displayed on the chart.
GetCurrencyPairHistoryProfit Function This function is responsible for calculating the total historical profit for the selected currency pair. It initializes several variables to store information such as the total number of deals, ticket numbers, order types, and profits.
HistorySelect Function The 'HistorySelect' function is used to fetch historical deal data. It prepares the data for analysis and calculation.
Iterating Through Historical Deals A 'for' loop is employed to iterate through all historical deals. For each deal, the code retrieves the profit and swap associated with the deal. It also determines the type of order (buy or sell) and checks whether the currency pair for the deal matches the current symbol.
Compiling the Code After writing the code, the user is instructed to press F7 to compile it. Compilation is essential to ensure that the code is error-free and ready for execution.
Testing in MetaTrader Once the code is compiled, the user is guided back to MetaTrader. They are then advised to press Ctrl+R to initiate the strategy tester. Within the strategy tester, the user selects the expert advisor created earlier, enables the visual mode, and starts a strategy test.
Visualizing the Expert Advisor Following the strategy test, the expert advisor is displayed on the chart. This visual representation provides users with a clear view of the historical profit for the chosen currency pair.
Additional Resources The video tutorial suggests that if the content was too fast or challenging to follow, users may explore a premium course on their website or watch basic videos as prerequisites.
Conclusion The tutorial wraps up by summarizing the key takeaway viewers have learned how to calculate and display historical profit for a specific currency pair using MQL5. By writing just a few lines of MQL code, they have successfully created a functional expert advisor.
In conclusion, this MQL5 tutorial equips viewers with the knowledge and skills to develop an expert advisor for historical profit calculations. It provides valuable insights into using the Trade.mqh library, fetching historical deal data, and testing the expert advisor in MetaTrader's strategy tester.
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