1. Setting Up MetaEditor:
- Open the MetaTrader 4 platform.
- Click on “View” in the top menu and select “MetaEditor” or press
F4. - MetaEditor is where you’ll write, compile, and manage your MQL4 code.
2. Basic Structure of an MQL4 Program:
OnInit(): This is the initialization function that runs once when the indicator or EA is attached to a chart.OnTick(): This is the main function that executes on every tick (price change).
3. Variables and Data Types:
4. Operators:
- Arithmetic (
+,-,*,/,%) - Comparison (
==,!=,>,<,>=,<=) - Logical (
&&,||,!) - Assignment (
=,+=,-=,*=,/=,%=)
5. Control Structures:
Conditional Statements:
Loops:
6. Functions:
7. Custom Indicators:
8. Expert Advisors (EAs):
9. Compiling and Running:
- Press
F7to compile your code. - If there are no errors, you’ll see “0 errors, 0 warnings” in the ‘Experts’ or ‘Indicators’ tab.
- Attach your EA or indicator to a chart in MetaTrader 4 to start using it.
This is just a basic introduction to MQL4. As you progress, you can explore more advanced topics like handling events, working with external files, and utilizing libraries.
Remember to thoroughly test your code on a demo account before using it in a live trading environment. Also, always keep backups of your code. Good luck with your MQL4 programming!
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