Poly Fast by PolyFast

Poly Fast shows who holds every Polymarket market and how those traders have actually performed.

TOP PLAYERS
On a market page, a panel above the order book lists the largest holders of each outcome: shares, average price, current value, P&L on this market, all-time P&L and markets traded. Sort by any of four orders.

TRADER CARD
Open anyone's Polymarket profile and a card in the corner shows their win rate by event, by market and by leg (with the low end of its 95% interval), their ROI, how much of their profit came from a single event, and their all-time P&L, volume and rank on every category leaderboard. A trader nobody has measured yet is measured on request and appears within about a minute.

TRADER PAGE
STATS on any holder opens a full breakdown by category, with a time-window switch and a sortable table.

Win rates count both closed and still-open positions, so a position ridden to zero counts as a loss instead of disappearing from the record.

Poly Fast is an informational overlay: it reads public data and displays it. It never touches your wallet, funds, or transactions. Works only on polymarket.com, minimum permissions.