Decoded Intelligence Signal
Walk-Forward Analysis
advanced
strategy
Verified: May 27, 2026Lexicon Core Definition
A rolling validation methodology where a strategy is repeatedly optimized on a moving in-sample window then validated on the subsequent out-of-sample window; produces a series of OOS periods spanning the full dataset, giving a more realistic performance estimate than a single IS/OOS split.
Analysis Breakdown
A rolling validation methodology where a strategy is repeatedly optimized on a moving in-sample window then validated on the subsequent out-of-sample window; produces a series of OOS periods spanning the full dataset, giving a more realistic performance estimate than a single IS/OOS split. Full explanation coming soon when Journey 22 content is ingested.