The Mark Price

Every trade on PredMart — opening, closing, or liquidation — uses the Mark price: a price taken from Polymarket's live order book.

How the Mark is calculated

The Mark is the best bid in Polymarket's order book right now.

You can check it yourself

The Mark is built entirely from Polymarket's public order book (its CLOB) — the same live data anyone can see. You can pull Polymarket's order book and check the best bid to confirm the price PredMart used was fair. Nothing is hidden or invented.

Related Pages

• Margin and Liquidation — how the Mark determines when a position is liquidated.
• Fees — entry, profit, and holding fees applied at open and close.