Concepts

Two-way and three-way surebets

A two-way surebet covers a match with two bets whose outcomes cannot both lose (Over vs Under, home win vs 'draw or away'). A three-way surebet covers the classic 1X2 market with three bets, one per outcome, usually at three different bookmakers. These two shapes are the bread and butter of arbitrage.

5 min read Updated 2026-07-02

Every arbitrage, however exotic, reduces to the same rule: the legs together must cover every possible result of the match. The number of legs is just a consequence of which markets you combine.

Two-way surebets (2 legs) #

The simplest and safest shape: two bets, two bookmakers, no result left uncovered. Classic pairs are Over vs Under on the same goal line, a home win (1) against 'draw or away win' (X2), or an Asian handicap against its mirror. Two legs mean two chances to make a placement mistake instead of three, which is why beginners should live here first.

Note how the stakes are unequal: each stake is inversely proportional to its odds so both returns land on the same number. The calculator does this for you; your job is only to place both legs fast and on the RIGHT markets.

Three-way surebets (3 legs) #

Football's main market has three outcomes (1, X, 2), and sometimes the best prices for each sit at three different bookmakers whose combined implied probability drops below 100 percent. You place three bets and every result returns the same amount.

Three legs cost more time and one more account with money in it, and the middle leg (the draw) often sits at a smaller bookmaker. The percentages compensate: three-way disagreements survive longer because fewer people can cover all three sides quickly.

Cross-market combinations #

Legs do not have to come from the same market. Scanners like OddStorm combine markets that jointly cover everything:

A goal line against a different goal line (Over 2.5 vs Under 3.0), which can also create middles.
An Asian handicap against a European handicap or a 1X2 leg (AH1 -1.5 vs EH2 +2.0).
Draw-no-bet or AH 0 against a plain win leg, replacing the draw exposure.

Which shape should you take? #

Take the percentage, not the shape, but respect your own speed: two-way arbs need two clean placements, three-way arbs need three. Until placing a leg takes you seconds, prefer two-way arbs and PreMatch pace. The profit difference between shapes is noise compared to the cost of one botched leg.

Where to go next #

Two market families power most cross-market arbs and both have their own guide: Asian handicaps, and the middles that goal-line gaps create.