Polymarket New Rules Released: How to Build a New Trading Bot
Polymarket has removed the 500ms taker delay and introduced dynamic taker fees, rendering many existing trading bots obsolete. The new meta shifts advantage from taker arbitrage to market making. A profitable bot in 2026 must be a maker bot, leveraging zero fees and USDC rebates. Key requirements include using WebSocket (not REST), fee-aware order signing with the `feeRateBps` field, and a sub-100ms cancel/replace loop to avoid adverse selection. The architecture involves connecting to the CLOB, querying fee rates per market, and placing maker orders on both YES/NO sides. For 5-minute BTC markets, a deterministic strategy involves placing maker orders at $0.90–0.95 with 10 seconds remaining, capitalizing on ~85% directional certainty. Critical mistakes to avoid are using REST, omitting feeRateBps, high-latency infrastructure, and outdated taker strategies. AI can assist in implementation, but must be guided by the new technical constraints.
marsbit02/25 09:38
