Arkham Intelligence has introduced an Elo-based rating system for Polymarket traders, scoring participants on prediction accuracy rather than bet size. Correct calls made at long odds earn higher scores under the new methodology. The current top-rated trader is "roberto73" with an Elo score of 2,489, posting a 49.7% win rate across 3,245 bets. The ratings are available alongside traditional PnL metrics through Arkham's platform.