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 combines Kalshi data with Polymarket so you can compare odds across both platforms and find the best prices.
Arbitrage occurs when the same event is priced differently on Polymarket and Kalshi. For example, if Polymarket prices "Event X happens" at YES = 60 cents and Kalshi prices the same event at YES = 55 cents, you could buy YES on Kalshi for less. If both platforms agree the event happened, you profit from the price difference. PredTerminal automatically scans for these cross-platform price gaps and alerts you when they appear. The bigger the gap, the larger the potential edge.
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 across both Polymarket and Kalshi in real-time. When multiple whales bet the same way on the same market, it is a strong conviction signal that often precedes price movement.
Yes — PredTerminal is completely free right now. No account required, no credit card, no limits.
You get full access to everything: live whale bets across Polymarket and Kalshi, the arbitrage scanner, top traders leaderboard, smart money signals, and all 6,000+ markets — in real time, no delays.
We're in growth mode and the goal is to get real traders using the product. We'll bring back a Pro tier for power users (email alerts, custom thresholds, extended history) after we hit 500+ active users. See the pricing page for the full story.
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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