See where the
real money goes.
Whale Watch surfaces the biggest trades on Kalshi and Polymarket, aggregated across platforms and cross-checked against sharp sportsbooks. Find where pros are positioning before games tip off.
From whale to wager
Prediction market trades come in. We aggregate them, score the side split, then surface where your sportsbook gives you the best price on the same bet.
Designed for sharp decisions
Every part of Whale Watch is built to surface where the smart money is going and how to act on it.
Cross-platform aggregation
Same bet on Kalshi and Polymarket gets combined into one row. $30k on one, $18k on the other becomes $48k total. No double counting, no missed signal.
Sportsbook cross-check
Every whale card pulls live splits from Circa (sharp) and DraftKings (public). When the markets agree with sharps and disagree with the public, that's the strongest tell.
Tune the threshold
Filter by minimum trade size from $500 to $100k+, time window from 6 to 48 hours, and any sport. Strip the feed to only the largest position changes or watch every meaningful trade.
Best book + edge
Whale price is 62¢ on Kalshi. Your best sportsbook is showing +160. We translate, compare, and surface the implied edge so you know where to actually place the bet.
Frequently asked questions
Whale Watch is a feed of the biggest trades happening on Kalshi and Polymarket prediction markets, focused on upcoming sports events. Each card shows the dollar volume, the side the money is on, the price the trade was hitting, and how that price compares to your sportsbooks.
Prediction markets like Kalshi and Polymarket attract professional and high-stakes traders because they're regulated, have tight spreads, and accept large size. A $50,000 trade on Kalshi means something a $50 ticket at DraftKings does not. When that money agrees with sharp sportsbooks like Circa and disagrees with public-driven books, you've found the edge.
If $30,000 hits "Lakers ML" on Kalshi and $20,000 hits "Lakers ML" on Polymarket within the same window, Whale Watch combines them into one card showing $50,000 total. Same real-world bet, no double counting. That cross-platform view tells you when both markets agree on a side.
Each whale card pulls live splits from Circa (sharp book) and DraftKings (public book) on the same selection. When the prediction market money lines up with Circa's handle but contradicts DraftKings' ticket count, that divergence is the strongest tell that pros are on one side.
You set the threshold. Whale Watch defaults to $5,000+ but can filter from $500 up to $100,000+. Most users tune to $5k or $10k for a balanced feed; serious bettors filter to $25k+ to see only the largest position changes.
Follow the money
Watch where serious capital is positioning before the market knows. Available on the Premium plan.