Market movers
When a market moves 10 points in a day, the crowd learned something - a poll dropped, a candidate stumbled, a deal leaked. This page ranks the largest 24-hour probability changes across live prediction markets, refreshed continuously from public Polymarket data. Practice trading any of them with play money on FantasyPoly.
Data: public Polymarket market data, 24-hour price change on the YES outcome, minimum $5K 24h volume. Updated at least every 30 minutes. FantasyPoly is a play-money simulator and is not affiliated with Polymarket.
A prediction-market price is a probability: 62¢ on YES means the market implies a 62% chance. A large 24-hour move means new information arrived - or that the market overreacted. For a forecaster, both cases are interesting. If you can identify which moves are justified repricing and which are momentum chasing, you have an edge worth testing. That test is free here: open the market, form your own probability before looking at the chart, then paper trade the gap.
Quiet markets teach you patience; moving markets teach you everything else. Volatile questions force you to size positions under uncertainty, decide whether to fade or follow the crowd, and watch how quickly an edge decays once news is public. Trading five big movers per week with virtual money builds more calibration data than fifty sleepy markets - and your mistakes cost nothing.