DocsConceptsWhat the verdict testsHold-outHold-outForge API 1Updated 13 Oct 2026Does it hold on price history it was never tuned on? Pass level#Share of the history held back30%Profit factor on unseen dataabove 1Thresholds version 1.19.0 A test that stops at this check reads Killed at the hold-out. Forge help ↗Previous Sample checkNext K-fold