Each one takes a number a backtest report gives you and works out what it can and can’t tell you. Everything runs in your browser; nothing is sent anywhere.
Winners and total trades in; the 95% Wilson range out, compared with break-even at your payoff.
The trade count at which the win rate’s 95% range clears break-even.
Fees and slippage as a share of R, expectancy after costs, and the cost that zeroes the edge.
What daily rebalancing costs a year, and what is left of a return quoted before costs.