Leaderboard
Return is profit as a share of what was traded. Past results don't predict future results.
Settled results
Leaderboard
The traders you follow and their latest moves.
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Sign-up offers from sportsbooks and prediction markets.
Only sign up where it's legal for you, and only play with money you can afford to lose. Don't want to see offers? Turn them off in .
21+ for sportsbooks (18+ in some states and on some prediction markets). Offers change often; check the operator's site before you sign up. Ball Knowledge isn't paid for these listings. Gambling problem? Call or text 1-800-GAMBLER.
Leaderboard
Where Polymarket, Kalshi and the sportsbooks disagree on the same game.
Same game, different prices. When one market is cheaper than the others think it should be, it shows up here. The fair price is the sportsbooks' average with their cut removed, or the other market's price when there's no sportsbook line.
Prices move fast, and markets can disagree for real reasons (injury news, lineups). A gap is a starting point for research, not a sure thing. Not betting advice. 21+.
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