Glossary
Limit order
Buy or sell only at a stated price or better. On Polymarket it rests in the CLOB until it fills, you cancel, or the market locks.
A limit order is an instruction to buy or sell only at a stated price or better. On Polymarket it rests in the order book until it fills, you cancel it, or the market locks for resolution. Posting a limit makes you a maker if it does not execute immediately.
Limits are how you avoid paying the spread and how you get filled in size without walking the book. The cost is uncertainty: a 38¢ bid does nothing if the offer sits at 41¢ through the news. Partial fills are normal on mid-cap books; you may end up with an odd lot of shares and leftover USDC. A limit is not a stop. If YES rips from 20¢ to 70¢ overnight, your 25¢ buy never trades and you simply missed it.
If you need a fill now, that is a market order (taker) and you will pay slippage. For research, a cluster of unfilled bids under the last trade is “support” only in the sense of displayed size — makers can pull it in a millisecond. Polydata does not place limits; we read the tape after the fact.