Two books that disagree
An arb exists when the best Over and the best Under, at different books, add up to less than 100% implied. We check every line we read, all day.
Arbitrage finder
Both sides, two books, a locked return, while it lasts.
When two books disagree enough, you can bet both sides and get paid either way. We scan every book we read, find those pairs and split the stake for you.
What it finds
The exact stakes
Each arb comes with the split that pays the same whatever happens, so you know the return before you place either leg.
Traps, flagged
Two books run by the same operator are one price sheet, so we refuse those pairs. Stale legs and suspended markets are dropped before they reach the board.
One arb from Oct 26, 2026
From our ledgerMarketP.J. Washington, points 15.5
Over+120 at Fanatics
Under-108 at Caesars
Locked return+2.69%
Lived5 min 58 s
- +120 pays 2.20 per dollar and -108 pays 1.926, so the two sides imply 45.5% + 51.9% = 97.4%.
- Anything under 100% leaves room: 1 / 0.974 = 1.0269, a 2.69% return on the total stake.
- On $100, put $46.68 on the Over and $53.32 on the Under. Either side returns $102.69.
The pair died when one book moved its price, 5 minutes and 58 seconds after we first saw it.
Our arb ledger, first seen 7:46 PM ET on Oct 26, 2026.
Before you bet it
- Both prices are still up. Most arbs die in minutes.
- Place the harder leg first, usually the one at the book likely to limit you.
- The two books are run by different operators.
- You know each book's void and palpable-error rules for that market.
- Your stake fits both books' limits, so you are not left holding one side.
Free and with the betting plan
What you seeSigned outBetting plan
How many arbs are liveShownShown
The top arbs, with return and booksTop 3Every arb
Prices and exact stakesLockedShown
Links into each bookLockedShown
Arb history and lifespan ledgerLockedShown
From our own data
4 min
Half of all arbs we logged were gone within 249 seconds, and 94.1% of them died because a book moved its price.
About 500,000 arbs logged from Jul 31 to Oct 28, 2026. The median arb returned 1.42%. Results vary.
Read the arbitrage guide