Definition
Holding opposing bets at two different lines with a gap between them — e.g. Over 7.5 at one book and Under 8.5 at another — so a result landing in the gap (a total of 8) wins both legs. Outside the gap one leg wins and the other loses, usually for a small net cost, so a middle is a cheap shot at a double win.
Related terms
- Arbitrage (Arb) — Backing both sides at different books at prices that sum below 100% — a guaranteed profit regardless of the result.
- Steam Move — A sudden, uniform line move across many books at once, driven by coordinated sharp betting — fast-moving professional consensus.