opencode-skill/skills/mql-developer

mql-developer

Claude Code skill for professional MQL4/MQL5 development on MetaTrader 4 and MetaTrader 5 platforms.

Covers the full ecosystem: Expert Advisors, custom indicators, scripts, libraries, UI panels, trading operations, external API communication, backtesting, and code protection.

What It Provides

• MQL4 & MQL5 language reference — data types, functions, predefined variables, preprocessor, error handling
• OOP & Standard Library (MQL5) — classes, interfaces, templates, CTrade, CPositionInfo, CCanvas
• EA architecture patterns — single-file, modular (Signal + Trade + Risk + Filter), state machine, multi-timeframe, multi-symbol
• Trading operations — order/position management with retry logic, risk-based position sizing, drawdown control, trailing stops
• Indicators & UI — custom indicators (buffers, draw styles, OnCalculate), graphical objects, CAppDialog panels, scripts
• External communication — WebRequest REST API, JSON handling, Node.js server integration, sockets, inter-program communication
• Backtesting — Strategy Tester modes, walk-forward analysis, Monte Carlo simulation, optimization
• Security & licensing — account-based licensing, server-side validation, anti-decompilation, MQL5 Cloud Protector

Skill Structure

mql-developer/
├── SKILL.md                            # Entry point with navigation table
└── references/
    ├── mql4-reference.md               # MQL4 language reference
    ├── mql5-reference.md               # MQL5 OOP, CTrade, Standard Library
    ├── architecture-patterns.md        # EA architectures and design patterns
    ├── trading-operations.md           # Orders, risk management, trailing stops
    ├── indicators-and-ui.md            # Indicators, panels, scripts, chart objects
    ├── external-communication.md       # WebRequest, JSON, Node.js, sockets
    ├── backtesting.md                  # Strategy Tester, optimization, Monte Carlo
    └── security-licensing.md           # Code protection and licensing

Uses progressive disclosure: SKILL.md loads first (~140 lines), then only the relevant reference file is loaded based on the task.

Installation

Copy the skill to your Claude Code skills directory:

# Option 1: Clone and copy
git clone https://github.com/YOUR_USERNAME/mql-developer.git
cp -r mql-developer ~/.claude/skills/

# Option 2: Direct copy (if already cloned)
cp -r mql-developer ~/.claude/skills/

The skill activates automatically when Claude detects MQL-related tasks.

Usage Examples

You: "Create an EA with MA crossover strategy for EURUSD"
You: "Add risk management with 2% per trade and max 10% daily drawdown"
You: "Build a custom RSI indicator with color zones"
You: "Set up WebRequest to send trade notifications to my Node.js server"
You: "Add account-based licensing to my EA"

Design Principles

Built following the skill-creator best practices:

• SKILL.md under 500 lines — concise entry point with navigation
• Progressive disclosure — reference files loaded only when needed
• No duplication — language references contain API signatures, specialized files contain production patterns
• Table of contents — all reference files include TOC for quick navigation
• Grep patterns — SKILL.md includes section headers for targeted search in large files

License

MIT