Everything from A to Z — odds, ratios, strategies and statistical models
Sports betting is not pure chance. Understanding odds mechanics, bookmaker margins and statistical models gives you a decisive edge.
This comprehensive guide explains everything you need to know to make informed decisions, from reading odds to using ELO and xG models.
An odd represents the implied probability of an event according to the bookmaker. The lower the odd, the more likely the event. Odds always include a bookmaker margin.
Example: PSG vs Marseille
PSG Win
1.45
≈ 69%
Draw
4.50
≈ 22%
Marseille Win
6.00
≈ 17%
💡 The odds reflect the bookmaker's probability. Odds = 1 / probability. E.g.: 1/1.45 = 0.69 = 69%
Decimal
2.50
Europe. Return = stake × odds
Fractional
3/2
UK. Profit = stake × (3/2)
American
+150
USA. Profit on $100 stake