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”.

The Numbers Are Not in the Code

A backtest belongs to a set of values, not to the source that produced it. Input schemas, three kinds of version, why every number should carry its reason, and the .set file format trap that turns generated presets into junk.

MQL5 MT5 Expert Advisor EA development preset files backtesting reproducibility tutorial course
2026/09/16

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How to use this blog
  • Pick a session (Tokyo/London/NY) and test one idea.
  • Use fixed risk per trade, then optimize only after stability.
  • Bookmark your best setups and keep a track record.