Enter the two best prices on opposite sides of a market and your total stake. If an arb exists, we split the stakes to lock in a guaranteed profit whoever wins.
Arbitrage ("arbing" or a "sure bet") means backing every outcome of a market at different books so the combined implied probability is under 100% — locking a profit regardless of the result.
Each side is staked in proportion to its implied probability (1 ÷ decimal odds) divided by the total, so both outcomes return the same payout.
Books adjust prices within seconds to minutes, and betting arbs can get your account limited. Speed and coverage matter — which is what an odds API automates.