Global Variable
This is a powerful addition to your MetaTrader 5 toolkit designed to optimize market analysis and performance. This Expert Advisor serves as automated trading software. It is utilized to monitor financial markets and execute trades based on predefined algorithmic rules, enabling precise position management without the need for constant manual oversight.
How to Setup and Use Global Variable
1. Installation: Open the "File" menu, select "Open Data Folder," navigate to MQL/Experts, paste your file, and restart the terminal.
2. Activation: Drag the EA from the Navigator onto a chart, ensure "Allow live trading" is checked in the Common tab, and verify the AutoTrading button is green.
3. Optimization: Right-click your chart, choose "Expert List," click "Properties" to adjust inputs, and save your preferred setup as a set file for future use.
4. Maintenance: Regularly check the "Experts" tab in the terminal window to monitor trade logs and potential execution errors.
Frequently Asked Questions
Q: Why is my EA not opening trades? A: Check the "AutoTrading" button, ensure "Allow live trading" is enabled, and verify your broker allows automated trading on your account type.
Q: Can I run multiple EAs on one chart? A: No, each chart can only host one active EA; however, you can open multiple charts for different currency pairs to run several EAs.
Q: What does the "smiley face" icon mean? A: A smiley face in the top-right corner of the chart indicates the EA is successfully running; a frowny face means it is disabled.
Description & Settings
This advisor demonstrates an example of global variables usage. The task of the advisor: store the calculation result in a global variable and get the global variable value on new initialization.
The global variable receives its compound name from text and magic number. A typical global variable name example: "main_id_1010458".
The idea of the advisor: binding the name of a global variable to magic number. The advisor algorithm is the following:
Start of the advisor: if the variable does not exist, it is created and assigned a calculated value; if the variable exists, its value is retrieved and stored in the variable.
Deinitialization adviser: if the variable does not exist, it is created and assigned a calculated value; if the variable exists, it is assigned a new calculated value.
