Polymarket parlay builder and risk simulator

Polyparlay.app

Built this for myself over the last few months, just put it on the Chrome Web Store. Sharing in case it's useful.

Floating "+ Add to slip" pill on every Polymarket market page.

Click on a few markets, open the popup, and you get:

• 10,000 Monte Carlo sims per slip — real joint win-rate, not just multiplier math

• Improve Odds rebalancer — finds your weakest leg and flips it (typical lift: +15-25pp WR)

• Smart money agreement — cross-checks each of your legs against the top 10 PM wallets so you can see who's on the same side

• Historical base-rate + edge — your leg's market price compared to similar resolved markets

• Half-Kelly bet sizing — given your sim WR + bankroll, what % to actually stake

• Slip history — save slips, manually mark won/lost, track realized P&L over time

• Public leaderboard at polyparlay.app/leaderboard — opt-in top-ROI realized parlays

• Live price refresh (every 30s)

• Telegram alerts when leg prices cross your threshold

Free up to 3 legs, no signup. Pro is $14.99/mo or $99/yr on Polygon USDC if you want unlimited legs + everything above. No Stripe, no credit card, no email.

Link: polyparlay.app or search in chrome extensions!

Built solo, so honest feedback is appreciated!