Walk-Forward Validation in Practice

📅 2026-08-12 · SmartQuant Academy

TL;DR: TL;DR: Walk-forward validation re-optimizes on rolling windows and tests on unseen data — the closest thing to real trading. Use it before trusting any backtest.

❓ FAQ

What's the difference from normal backtest?

Normal backtest tests one parameter set on all history; walk-forward re-fits periodically and tests out-of-sample.