Walk-Forward Validation. Chronological Development → Validation → Out-of-Sample windows. No random splitting. No future data leakage. AI excluded from all calculations.
How to read this page
Development applies fixed rules. It is NOT training — no parameters are learned.
Validation tests if the approach generalizes to nearby but unseen days.
Out-of-Sample is the final, untouched test. This is the only number that matters.
Historical evidence only. Not a prediction or guarantee.