How to Read Liquidity on Polymarket (US 2026)

Official Glossary: size is the number of contracts available to buy or sell at a given price; liquidity is how much of that size is there to trade. Official Liquidity: that clip is the size available at each price level on the book. It is resting orders other users left, waiting to be matched. It is not a sportsbook hold, and it is not a number we reprint.

Official Liquidity: each listed price shows how many shares can trade there before the next level is touched. Official Prices & Market Data: a market order fills at the best available price on the other side if size is there. The available clip is the now-book. It is not a promise the same clip will still be sitting after you swipe.

Official Spreads: you buy at the ask. Official Prices & Market Data: a tight spread means the market is liquid; a wide spread means fewer people are trading. Official Liquidity: treat the displayed price as dynamic, especially in live sports. The cents on the ticket are a display. Posted size is whether that display can actually fill your clip. How to read Yes/No prices is the number. This page is the depth under it.

Official Browse Markets: find markets on the home screen; each tile shows the question, the current Yes and No prices, and a resolution date. Official Place a Trade: tap any market to open it. Official Liquidity puts available size on the order book of that opened ticket. Official Browse Markets does not list Liquidity on the tile. We will not invent a home-screen “Liquidity $” chip those pages do not print. If the sports desk is hidden where you live, stop.

Official Place a Trade, Official Browse Markets, and Official Glossary do not reprint a retail column or tab labelled “Liquidity $” on the swipe we checked. We will not invent one. The action is: on that opened ticket, look at the posted size / available contracts at the prices you would take. If the live control is labelled differently — or a dollar Liquidity stamp is missing — use the live screen, then read size on the book. Official Website vs App: US residents do that in the Polymarket US app.

Official Markets API names liquidity as current market liquidity (also liquidityNum) and lets filters speak in USD. Official market-book stats name qty as quantity available at a price, plus bidDepth and askDepth as how many levels sit on each side. Official Data Guide lists volume under market statistics — not a retail Liquidity chip. Those are published field names. Official Place a Trade does not reprint them as a Liquidity $ stamp. We will not paste an API field onto the US swipe as if the retail page printed that menu.

Official Liquidity Incentive Program is a published rewards pool for resting limit orders close to the best price — scored on price and size, not a retail Liquidity chip and not a depth equation. We will not paste that program onto the market-page stamp as if Place a Trade printed it. If you wanted the resting-price swipe, that is How to place a limit order. If you wanted the cost stack, that is How Polymarket fees work.

Official Liquidity: orders fill against available liquidity starting at the best available price. If that level cannot cover the clip, the remaining shares fill at the next prices. Official Price Impact: that walk is how order size moves your average fill. Official Glossary: price impact is how much limited liquidity moved that fill; slippage is the gap between the price you expected and the price you received. We do not reprint a live ladder.

Official Liquidity prints a thin teaching book: 40 shares at 75¢, then 60 at 76¢, then 80 at 77¢. A 120-share buy in that example cannot stay at 75¢ — part of the clip fills at 76¢ or higher. Official Price Impact uses a different docs book (15¢ ask, 9,150-share clip) for the same idea. Those are published teaching fills. They are not a live moneyline we invent, and they are not the 30¢ ladder on the order-book how-to.

Official Liquidity: size can vanish late in a fourth quarter, in overtime, right after a score or injury, or when the result looks decided. Official Price Impact adds quiet periods, pre-announcement windows, and near-deadline cancels. Official Price Slippage: markets stay open until the outcome is confirmed even if the result looks certain, and liquidity can thin on the side already priced as likely. A small posted clip is why the fill walks. How to read the Polymarket order book is that ladder — this page only names the thin book.

Official Markets API names volume as total trading volume, plus windowed fields volume24hr, volume1wk, and volume1mo. Those are published history windows: matches that already printed. Official Data Guide lists volume under market statistics. A 24h tape is not the clip you can lift now. How to read volume is that stamp. This page does not reprint it.

Official Glossary: liquidity is how much size is available to trade at listed prices. Official Markets API names liquidity as current market liquidity. Official Liquidity: that posted clip is what can trade at a level before the next price is touched. Two different clocks. A busy 24h window can sit next to a thin best ask.

Official Spreads: you buy at the ask. Official Prices & Market Data: a tight spread means the market is liquid; a wide spread means fewer people are trading. Official How are Polymarket odds determined?: prices move when the next orders match. A fat 24-hour volume number does not refill a pulled clip, and it does not lock settlement. Official Market Settlement: a winning contract still settles at $1.00 and a losing contract at $0.00. Read posted size first. Then glance at volume as history.