Polymarket Trading Bot Position Sizing
A profitable signal is not enough. A Polymarket trading bot also needs to decide how much capital to risk.
Position sizing is one of the most important—and most underestimated—parts of Polymarket algorithmic trading. A bot with a good signal can still perform badly if it repeatedly overcommits capital, ignores liquidity, or treats correlated markets as independent opportunities.
This guide shows how to build a practical Python position-sizing engine for a Polymarket bot using estimated probability, market price, fractional Kelly sizing, liquidity caps, and portfolio-level risk controls.
Polymarket provides developer resources for programmatic market interaction, including market data and trading infrastructure. Builders should verify implementation details against the current official documentation before connecting production capital.
