15-Minute Crypto Market Spread Making
Hedged two-sided spread trades on 15-minute crypto markets with entry cost limits, acting as a market maker on binary options.
This strategy places both a YES and NO order on Polymarket's 15-minute crypto up/down markets, creating a spread that captures the bid-ask difference. The bot hedges the position so that no matter which side wins, the total payout exceeds the combined cost, earning the spread as profit. Entry cost is kept below a configured limit.
Entry occurs when the mid-price between YES and NO allows a profitable spread (both sides bought below fair value of $1). Exit is automatic at market resolution (15 minutes). The bot uses TypeScript with Polymarket's Gamma API for order management and includes risk controls for maximum position size per market.
No live P&L shared. Profit depends heavily on market liquidity and spread tightness — tighter spreads yield lower but more frequent profits. Risks include sudden price moves before both legs fill (partial fills), resolution manipulation, and Polygon gas spikes eating into thin margins.