How to Build a Polymarket Trading Bot After TWAP Implemented
Polymarket switched its short-duration crypto up/down markets (BTC, ETH, SOL, XRP, and others) to Time-Weighted Average Price (TWAP) resolution on August 7, 2026, at 00:00 UTC. This replaced single-price snapshot settlement with Chainlink-powered averages, sharply reducing last-second manipulation. For bot builders, the change is material. Strategies that relied on predicting or reacting to a single expiry-tick price no longer work the same way. Bots must now incorporate continuous TWAP feeds, model averages over the lookback window, and adapt signals and risk rules accordingly. This article covers the full process of building a production-oriented trading bot in the post-TWAP environment. What Changed with TWAP 5-minute markets**: Resolve against a 30-second Chainlink TWAP. 15-minute and 4-hour markets**: Resolve against a 60-second Chainlink TWAP. Both the opening price (the “price to beat”) and the final settlement price come from the applicable TWAP feed. The averaging window is a trailing lookback immediately before market close. Sustaining a manipulated price across the full window is far more expensive than a single-tick push, which is the core integrity improvement. Liquidity rewards of $1 million were also rolled out across affected markets through August 2026 to support depth during the transition. Prerequisites Python 3.11+ (recommended for most bots) or Node.js 24+ Funded Polygon wallet holding pUSD (or USDC.e that can be wrapped/bridged via Polymarket flows) plus a small amount of POL/MATIC for any residual gas Private key for an EOA or appropriate proxy/Safe setup Basic familiarity with async programming, WebSockets, and order-book concepts VPS or always-on host with low-latency connectivity to Polymarket endpoints (US East often works well) Install the current official SDKs: # Python (unified client recommended) pip install polymarket-client # TypeScript npm install @polymarket/client Older py-clob-client / @polymarket/clob-client packages are depreca