The practice of recording not just quantitative execution results, but also the market environment, reasoning, and your qualitative emotional state. It is the only objective data source to counter the human "Hindsight Bias."
How to Do It
Along with entry reason, stop level, and fill result, briefly record "what emotion I was feeling" every single time.
Effect
Visualizes unconscious behavioral patterns (e.g., holding losers, cutting winners early) and reveals concrete areas for rule improvement.
How to Use
1. Log facts immediately after the fill
2. Extract patterns during a weekly review
3. Reflect findings into next week's rules