Arkham Intelligence has rolled out an Elo-style leaderboard that ranks prediction-market traders by the accuracy of their bets, not their total profit.

It currently covers Polymarket, where harder, longer-odds calls lift a trader's rating more than safe favorites. Top trader GardenerCx holds a 64.3% win rate over 2,644 bets.

The accuracy-first scoring means smaller, sharper traders can outrank larger, more profitable ones.