Arkham has introduced an Elo rating system for Polymarket traders that evaluates performance based on prediction accuracy rather than bet size. The ranking algorithm rewards correct calls at long odds more heavily than safer predictions, providing a skill-based metric for assessing trader performance on the prediction market platform. The current top-rated trader is "Roberto73," who holds an Elo score of 2,489 with a 49.5% win rate across 3,217 bets. This new rating system allows users to identify and track high-performing predictors based on historical accuracy and risk-adjusted returns rather than capital deployment.