Definitions.
Definite fill rate = matched live orders / all live order attempts.
Possible fill rate = matched orders plus maker orders whose cancel result was not_canceled or order-not-found / all attempts.
Prediction win rate = signal side matched Binance spot 5m open-close direction.
Trade win rate = resolved order proxy PnL greater than zero.
Signal ask bucket groups rows by the ask seen when the executor decided. For ask above 0.53, the current strategy still used maker fallback at 0.53, not taker above 0.53.
Observed fee PnL uses the actual executor price and mode. Hypo taker fee PnL assumes every row in that bucket was taker-filled at the observed ask.