Everything you need to know about PredTerminal and prediction markets.
Polymarket is a decentralized prediction market platform where users trade on the outcomes of real-world events -- politics, economics, sports, culture, and more. Each market is a question (like "Will X happen?") and you buy YES or NO shares. Prices between $0 and $1 reflect the crowd's probability estimate. If you are right, you get $1 per share. PredTerminal tracks all active Polymarket markets and the whale activity within them.
Kalshi is a CFTC-regulated prediction market exchange based in the United States. It offers event contracts on politics, economics, weather, companies, and more. Unlike Polymarket (which uses crypto), Kalshi uses USD and is fully regulated. PredTerminal prices the same question on every site it covers, so you can compare odds side by side and find the best price.
Arbitrage is when the same event costs less on one site than another. If Polymarket prices "Event X happens" at YES = 60 cents and Kalshi prices the same event at YES = 55 cents, you can buy YES on Kalshi for less. If the two settle the same way, you keep the difference. PredTerminal watches every site it covers for those gaps and tells you when one opens. The bigger the gap, the more it is worth.
Whale bets are large trades -- typically $10,000 or more -- made by big players in prediction markets. These bets are significant because they often represent informed money. When a trader puts $50K or $100K on a single outcome, they likely have strong conviction based on research or inside knowledge. PredTerminal tracks these bets in real time across every site it covers, today Polymarket and Kalshi. When several whales bet the same way on the same market, that is a strong signal, and it often comes before the price moves.
Most of it. No account needed for live whale bets across every site we cover, top traders, all 6,000+ markets, and the public track record.
The price gap board is where the line sits. Free shows the top 3 gaps live and the rest of the board 15 minutes behind. Pro shows every row live and mails a daily email with the top 5. See the pricing page.
Yes, absolutely. You can cancel your subscription at any time from your account page. When you cancel, your Pro access continues until the end of your current billing period -- you are never charged again after cancellation. There are no hidden fees, no cancellation penalties, and no questions asked. If you choose the annual plan, you can still cancel anytime and retain access through the end of your paid year.
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