Trading Systems Lab

Practical notes on EA building, MT5 testing, risk control, and market timing. Less hype, more systems.

Tip: Use short keywords like “London”, “ATR”, “spread”, “JPY”.

From Indicator to Execution: Turning Ideas Into MT5 EAs

Learn the real EA development process from indicator idea to live MT5 execution. A practical guide covering indicator logic, signal generation, risk handling, and order execution for building robust Expert Advisors.

EA development process indicator logic signal generation order execution MT5 EA development techniques

2026/02/16

Designing EA Logic That Survives Market Regime Changes

Markets change faster than most EAs. Learn how to design EA trading logic that survives market regime changes using adaptive structure, regime filters, and robustness-first thinking instead of brittle optimization.

EA trading logic market regimes adaptive EA system robustness MT5 EA development techniques

2026/02/09

Common EA Coding Mistakes That Quietly Kill Performance

Discover the most common EA programming mistakes in MQL5 that silently destroy performance. Learn how small bugs, poor assumptions, and optimization errors quietly drain profitability in real trading.

EA programming mistakes MQL5 bugs EA optimization trading system errors MT5 EA development techniques

2026/01/26

How I Structure a Profitable MT5 EA From Scratch

Learn how to structure a profitable MT5 Expert Advisor from scratch. This guide covers EA architecture, MQL5 file structure, trading logic design, and production-ready best practices used in real trading systems.

MT5 EA development EA architecture MQL5 structure trading logic design algorithmic trading techniques

2026/01/15

Fixing My Least-Winning MT5 EA: Tokyo Swing Trend (USDJPY H1) — Why Exits, Trailing, and Sizing Matter More Than Entries

I break down my “least winning” MT5 EA (Tokyo_SwingTrend_USDJPY_H1) and explain the real reasons it struggles: an ambitious 2.5R target paired with RSI pullbacks, a too-tight ATR trailing stop, and fixed minimum lot sizing. I also share practical, code-ready optimization directions: 1.5R–1.8R targets, trailing start at 1.5R with wider steps, equity-risk position sizing, and session/time logic driven by data.

MT5 EA development USDJPY algorithmic trading ATR trailing stop risk-based position sizing RSI pullback strategy techniques