Quick answer
Totals: A totals market is a bet on whether the combined score (goals, points, runs) lands over or under a line set by the bookmaker.
Also called: over-under, O/U
Explained, with an example
Example: Over/Under 2.5 goals — three or more goals means Over wins. Half-point lines avoid a tie (push); whole-number lines can push and return stakes. Odds-API.io's arbitrage endpoint works line by line, e.g. Totals 2.5, comparing the best over and under prices across bookmakers [1].
Try it: tools and tutorials
Frequently asked questions
What is a totals (over/under) market?
A totals market is a bet on whether the combined score (goals, points, runs) lands over or under a line set by the bookmaker.
About this guide
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Author: Ken Lin · Corrections: if you spot an error, we review it and date-stamp the fix.
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Sources
- Arbitrage Bets guide (formula, response format, limitations) — Odds-API.io docs, accessed 2 Nov 2026