Order-book capture
For each fill the validator requests the order book, normalizes its levels and records the best bid, best ask, timestamp and a hash of the book. The book it trades against is at most a couple of seconds old.
Before a fill it checks that the book is two-sided, the spread is within the limit and there is enough depth on both sides. Buys fill at the best ask and sells at the best bid. NO prices are the complement of the YES book.
Price feeds and charts
We built our own price feeds and charts, running on live data from Hyperliquid, Phoenix and Polymarket. Prediction-market and perp fills both come from the venue’s order book.
Display marks
Positions are marked at the price you could sell at, which is the YES bid, or 1 − the YES ask for NO. Perps are marked at the exit side: the best bid for a long, the best ask for a short. Marks read a cached book up to 60 seconds old, but your fill always comes from a fresh book.