WhaleTrack – I track the biggest Polymarket bettors and grade them by consistency

whaletrack.app — free, no login

Polymarket has made whale wallets public, but raw P&L is misleading. A single $660K bet tells you nothing about whether that person is actually good at prediction markets.

So I built WhaleTrack. It pulls the top wallets from Polymarket's leaderboard in real time and adds two things the raw data doesn't show:

Reliability Grade (A+→D) — based on win rate across their full trade history, not just their biggest hit. 70%+ WR over 20+ trades = A+. One lucky bet from a C-grade wallet gets flagged as noise.

True P&L — leaderboard P&L + pending redeems (uncashed winning positions). The official number undercounts profits.

Stack: vanilla JS, Vercel serverless functions, Polymarket data API. No database — everything is fetched live.

Also just shipped a daily email digest (via Resend) that sends the top whale bets, market consensus, and leaderboard every morning.

Happy to answer questions about the Polymarket API or the reliability scoring approach.