MQL5 — Complete Guide

In this tutorial, you will learn about MQL5. We cover key concepts, practical examples, and best practices to help you master this topic.

MQL5 (MetaQuotes Language 5) is a C++-like programming language for developing algorithmic trading robots on the MetaTrader 5 platform. Master modern algorithmic trading with hands-on tutorials.

1. What Is MQL5?

Origins, platform, and use cases

2. MQL5 vs MQL4

Key differences and migration path

3. MQL5 Syntax

Variables, types, and operators

4. Object-Oriented Programming

Classes, inheritance, and polymorphism

5. Event Handlers

OnInit, OnTick, OnDeinit, OnTimer, OnTrade

6. Trade Classes

CTrade, CPositionInfo, COrderInfo

7. Technical Indicators

Handle-based indicators and CopyBuffer

8. Expert Advisors

Building automated trading bots

9. Market Orders

Request/result pattern for trading

10. Position Management

Opening, closing, and modifying positions

11. Pending Orders

Limit and stop orders

12. Multi-Currency EAs

Trading multiple symbols simultaneously

13. Backtesting and Optimization

Strategy Tester, genetic optimization, forward testing

14. ONNX and Python Integration

Machine learning models in MQL5

15. Real-World Projects

Build production-ready EAs

Published Topics

Mql5 Oop

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Mql5 Technical Indicators

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What Is MQL5?

MQL5 is a C++-like programming language for MetaTrader 5, supporting OOP, multi-currency backtesting, and ONNX integration.

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MQL5 vs MQL4 — Complete Guide

MQL5 adds OOP, position-oriented trading, handle-based indicators, and multi-currency backtesting over MQL4.

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MQL5 Syntax — Complete Guide

MQL5 syntax is C++-inspired with classes, inheritance, polymorphism, templates, and operator overloading.

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Event Handlers — Complete Guide

MQL5 event handlers include OnInit, OnDeinit, OnTick, OnTimer, OnTrade, and OnChartEvent.

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Trade Classes — Complete Guide

MQL5 provides CTrade, CPositionInfo, COrderInfo, and CSymbolInfo classes for structured trading.

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Expert Advisors — Complete Guide

Learn Expert Advisors. Step-by-step tutorial with practical examples.

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Market Orders — Complete Guide

MQL5 uses MqlTradeRequest/MqlTradeResult structs with OrderSend() for all trade operations.

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Position Management — Complete Guide

MQL5 separates positions from orders with PositionSelect, PositionGetDouble, and PositionGetInteger.

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Pending Orders — Complete Guide

MQL5 pending orders use TRADE_ACTION_PENDING with ORDER_TYPE_BUY_LIMIT, SELL_LIMIT, etc.

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Multi-Currency EAs — Complete Guide

MQL5 supports trading multiple symbols simultaneously with proper symbol context management.

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Backtesting and Optimization — Complete Guide

MQL5 Strategy Tester offers every-tick mode, genetic optimization, and forward testing.

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ONNX and Python Integration — Complete Guide

MQL5 loads ONNX models for ML inference, bridging Python-trained models with live trading.

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Real-World Projects — Complete Guide

Build production-ready EAs with proper risk management, multi-currency support, and backtesting.

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All 15 topics in MQL5 — Complete Guide are published.