How to Find the Best Polymarket Traders to Copy
Everyone wants to copy the top Polymarket trader. The problem: "top" depends on what you measure. A trader with a 300% ROI over three markets isn't more skilled than one with 40% ROI over 500 — they're luckier. Here's the framework Polybuild uses to surface traders actually worth copying.
Why raw P&L is misleading
Polymarket leaderboards that sort by all-time profit systematically over-weight whales who got one or two big political markets right. Their edge may be zero — they just happened to size up on a winner. Copying them after the fact is the definition of recency bias.
The metrics that actually correlate with future performance are sample size (number of resolved positions), consistency across market categories, and Sharpe-style risk-adjusted returns.
The four filters Polybuild applies
- Minimum 100 resolved markets — anything less is too noisy
- Positive ROI across at least three distinct categories (politics, crypto, sports, etc.)
- Max drawdown under 40% — bankable traders don't blow up
- Recency: at least 20 trades in the last 30 days
What a good trader's chart looks like
Smooth upward curve with visible but recoverable drawdowns. Not a flat line (too cautious, won't scale your money), not a hockey stick (one lucky market), not a step function of alternating wins and losses (market-maker-style, hard to copy profitably because you'll miss the fills).
Polybuild's Top Traders page filters out wallets that fail these tests and ranks the rest by a composite score, not raw P&L.
Red flags
- Trades concentrated on a single resolved event
- Huge position size followed by silence — probably an insider/one-off
- Extreme ROI with <50 markets — still in the luck regime
- Bot-like uniform sizing with 51% win rate — market-making, not directional edge