Polymarket Trading Bot
Hlib Yarovyi
A Polymarket trading bot with six strategies and one shared risk layer.
We built a custom trading bot for Polymarket that runs six strategies in one async Python process and keeps each strategy's risk under control.
The Problem
Polymarket is a prediction market on Polygon where traders buy YES and NO shares on future events. Compared with large centralized exchanges, these markets can be less efficient and more fragmented.
That creates opportunity, but only if the system can react fast. A useful Polymarket trading bot needs to watch external signals, detect pricing gaps inside the market, place orders through the CLOB API, and control exposure across many open positions.
This project needed to combine several strategy types in one engine: on-chain wallet monitoring for copy trading, internal YES and NO arbitrage checks, Binance price signals for related markets, and order book strategies based on momentum, mean reversion, volume, and thin liquidity.
All of that had to run inside one Python service with low latency and clear risk limits.
The Challenges
Protocol-Level Authentication
The bot had to sign requests correctly with EIP-712 and work with layered CLOB authentication. Small mistakes break order flow.
Several Strategies Could Hit the Same Market
If multiple strategies act at once, the engine can double exposure or create conflicts. Shared state and risk checks were required.
Copy Trading Needs Realistic Latency
On-chain monitoring means choosing between speed and confirmation. We used confirmed blocks because reliability mattered more than theoretical speed.
Thin Markets Create False Signals
A wide spread is not always an edge. Sometimes it only shows weak liquidity. The bot had to separate real mispricing from noise.
How It Works
Run Everything in One Async Engine
The bot uses one asyncio event loop. Each strategy runs independently, while a shared state layer tracks positions, exposure, and capital.
Monitor Wallets for Copy Trading
The engine watches selected Polygon wallets and mirrors qualifying trades after confirmed transactions appear on-chain.
Use Binance Moves as External Signals
When BTC or ETH moves sharply on Binance, related Polymarket markets can reprice. The bot uses those moves as one input for position entry.
Scan for Internal Arbitrage
The bot checks whether buying both YES and NO costs less than the guaranteed payout. It only acts when the spread is large enough to justify execution risk.
Keep Risk Split by Strategy
Each strategy has its own capital budget, and the engine also enforces a market-level exposure cap.
System Performance
6 strategies — Running concurrently inside one async trading engine
Under 1 second — Signal-to-order latency from event detection to order submission
99%+ uptime — Observed during the production period
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Posted Jul 1, 2026
Async Python trading engine for Polymarket running six concurrent strategies with a shared risk layer and sub-second execution.
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