Sports arbitrage means betting on every possible outcome of an event at odds that guarantee profit no matter what happens. You are not picking a winner. You are catching a pricing mistake between bookmakers.
Every bookmaker sets their own odds. When SportyBet, BetPawa and Bet9ja disagree enough on the same fixture, you can cover every result and still come out ahead. It is legal in most places. You are taking prices that are publicly listed. The hard part is finding the gap fast enough and getting every leg on before odds move.
If the combined implied probability of all outcomes is less than 100%, an arbitrage opportunity exists. The gap is your margin.
Implied probability
Decimal odds convert to implied probability: 1 ÷ odds × 100. Add every outcome. Under 100% means arb.
On Mandurah Magic (W) vs Joondalup Wolves (W): Away at 6.50 on Nairabet is 15.4%, Home at 1.23 on BetKing is 81.3%. Combined 96.6%, so 3.43% profit. The screenshots show the arb in the surebets list, then the stake split on ₦100,000.
What you will learn in this module
- What sports arbitrage is and what it is not
- Decimal odds and implied probability
- Two outcome vs 1X2 (three outcome) markets
- Legal and practical notes for Nigeria and other African markets
