Inputs
Periodic strategy returns, periods per year, number of variants tried, optionally the variants themselves.
Outputs
Sharpe with a bootstrap interval, Probabilistic and Deflated Sharpe, minimum track record, drawdown at 95%, probability of backtest overfitting.
Evidence
In 1,000 null simulations the best of 50 variants passed plain PSR 92% of the time and DSR 0%; a real edge among 20 variants was found 37% of the time.
Limits
Conservative by design: a pass is strong evidence, a fail is not proof of no edge. Costs must already be in the returns.
API
POST /labs/backtest/check {returns, periods_per_year, trials, variants}Minimum data: 30 returns; 64 rows per variant for overfitting.
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