Glossary · Strategy
Arbitrage (Arb)
Backing every outcome at different books to lock in a guaranteed profit.
When two books disagree enough that the sum of inverse decimal odds is below 1.00, you can stake each outcome and win regardless of result. Arbs are real but small, fleeting, and aggressively limited by sportsbooks.
Formula
arb exists when: Σ (1/dᵢ) < 1 profit% = (1 - Σ(1/dᵢ)) · 100