Sports arbitrage, explained with the math visible.

Calculate stake allocation across opposing prices and understand when combined implied probability creates an arbitrage.

Check two-way and three-way prices for a mathematical surebet and learn how balanced payouts work.

Learn why comparing the same market across sportsbooks matters and how price differences create opportunities.

A plain-English guide to arbitrage, implied probability, execution risk, stale prices and market settlement.

Walk through transparent two-way and three-way arbitrage examples using American and decimal odds.

Convert American odds into implied probability and understand what the price says before removing vig.

Convert signed American odds into decimal odds, implied probability and potential payout concepts.

Understand sportsbook hold, overround and no-vig probability using opposing market prices.

Learn what line movement measures, why prices move and why timing and confirmation matter.

Understand middle opportunities, the interval between prices and why a middle is different from guaranteed arbitrage.

How moneylines, run lines and totals can produce cross-sportsbook price differences in baseball.

How NFL moneylines, spreads and totals can diverge across sportsbooks and what to verify before acting.

How fast-moving NBA moneylines, spreads and totals can create temporary cross-book price differences.

How NHL moneylines, puck lines and totals can differ across books and why settlement rules matter.

The home for reproducible InQsi research based on aggregated market observations, methodology and clearly stated sample windows.