What is a strategy robustness score?

Our robustness score is a 0–100 grade summarizing how well a backtest result survives adversarial checks: out-of-sample performance, walk-forward consistency, parameter sensitivity, Monte Carlo drawdown ranges and a deflated Sharpe that accounts for how many variants were tried. A pretty equity curve scores nothing by itself — surviving data it never saw is what scores.

Read it as failure-odds compression, not a guarantee: a high score means the result is unlikely to be curve-fit luck; a low score means the backtest's promise is statistically hollow. Every free /whatif run includes the scorecard, so you can see the verdict mechanism before signing up for anything.