How Fidelity Lab tests a strategy: PIT-faithful walk-forward, explained
Written by the TradeHouse team.
Fidelity Lab runs every strategy through a point-in-time (PIT) faithful walk-forward test — meaning the backtest only ever sees data that would genuinely have been available at each historical moment, never data from the future. This is the same discipline TradeHouse applies to its own research: a backtest that leaks future information produces a fake edge.
On top of the walk-forward test, Fidelity Lab runs 11 contamination detectors that catch the most common ways a backtest silently cheats — look-ahead bias, survivorship bias, and data leaks among them — plus per-market rulers, because a rule that's fair for one market family (say, binary prediction markets) can be unfair for another (continuous-price equities).
The output is a single cost-netted verdict: does the strategy clear real trading costs (fees, spread, slippage) after all of that, or not. Fidelity Lab launched September 2026 on Free / Starter $49 / Pro $199 / Enterprise $499 per month tiers.