Sports Cross-Line Arbitrage

How It Works The multiplex-invertsoap119/polymarket-sports-arbitrage-bot uses the Polymarket CLOB V2 API to scan sports-related prediction markets for cross-line arbitrage opportunities — situations where the combined probability of mutually exclusive or complementary outcomes across different but related markets sums to less than 1, or where equivalent outcomes are priced differently across separate market listings.

Entry / Exit Conditions Entry triggers when a cross-line mispricing is detected that exceeds fees and a minimum profit threshold. The bot then executes paired trades across the identified markets. Exit is at resolution of the underlying sports events, or earlier if the spread converges.

Verification The repo was created and last updated on 2026-06-28 (the report date), making it brand new with no track record. Stars and forks are zero.

Implementation Notes Built in TypeScript using the CLOB V2 API. Sports markets on Polymarket can have complex interdependencies (game outcomes, player props, tournament brackets), requiring a robust market-mapping layer to identify genuine arbitrage vs. spurious correlations.

Risks Sports markets often have correlated liquidity — when one side moves, the other adjusts quickly. Event cancellations or rule changes can invalidate assumed correlations. Very new codebase with no demonstrated results.