Polymarket PnL checker

Trade PnL is PredCheck’s independent measure of what a trader actually earned. It starts from raw fills: every dollar that went into a market, and every dollar that came back out through a sale or at settlement. From that gross figure it subtracts the fees implied by each market’s published fee schedule. Maker rebates and liquidity rewards are paid to an account rather than to a market, so they are reported alongside rather than folded in.

The unit is the round — one trader’s complete activity inside one short-term market — rather than the individual fill. Six orders inside a single BTC 5-minute market are one round with one economic result, which is the only way win rate and average return stay meaningful for high-frequency traders.

Two accounting details matter on these markets. Fees follow a curve that peaks at even odds, so scalping coin-flip prices costs far more than trading near-certain ones; a gross-profitable round can be a real loss once fees land. And where a trader minted complete sets instead of buying shares, PredCheck charges the real 1 USDC cost per set — without that, a market maker’s sales would read as pure profit.

Anything PredCheck cannot determine from a settled source is labelled. Schedule-derived fees show as Estimated; rebates with no authenticated source show as Unavailable. Neither is ever replaced with a zero.