Middles: win both bets when the result lands in between
Bookies don’t always set the same line. When one has Over 189.5 points and another has Under 192.5, you can back both. If the final score lands in the gap, both bets win.
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How a middle works
Middles turn up when bookies post different lines on the same market. They’re most common on totals and handicaps in high-scoring sports like AFL, NRL, NBA and NFL.
- Find a gapOne bookie’s Over line sits below another bookie’s Under line on the same market.
- Back both sidesBack the Over at one bookie and the Under at the other, splitting your stake so either result costs the same.
- Most results missIf the score lands outside the gap, one bet wins and the other loses, and you’re down a few dollars.
- The middle landsIf the score lands inside the gap, both bets win. That’s the double payout.
A worked example: AFL total points
Bookie A has Over 189.5 points at 1.95. Bookie B has Under 192.5 points at 1.95. You have $200 to use, so you back each side for $100. A final score of 190, 191 or 192 lands in the middle.
The bets
| Over 189.5 at Bookie A, odds 1.95 | $100.00 |
| Under 192.5 at Bookie B, odds 1.95 | $100.00 |
| Total staked | $200.00 |
The outcomes
| 189 or under: the Under wins, returning $195 | −$5.00 |
| 193 or over: the Over wins, returning $195 | −$5.00 |
| 190 to 192: both win, returning $390 | +$190.00 |
Example odds only. This isn’t locked in: most results miss the middle and cost a few dollars ($5.00 here). If the middle lands about 1 time in 25, that averages +$2.80 per bet. The wider the gap between the two lines, the more often it lands.
Middle calculator
Enter the odds for each side, your total stake and your best guess at how often the result lands in the middle. The calculator splits your stake and shows what the middle is worth on average.
Finding good middles by hand is the hard part
Lines move constantly, and a gap between two bookies can close within minutes. Comparing lines and calculating value manually isn’t realistic.
🔒 Members see live middles
The Middle Software scans lines and totals across bookies and calculates the expected value of each one so that you can only take the best.
See what’s in ProYour middles toolkit
Middle Software
Finds middles across lines and totals in AFL, NRL, NBA, NFL and more, so you only spend time on the gaps worth taking.
Compare plans →Middles course
Explains how middles work, which markets suit them and how to size your bets, with worked examples.
See the courses →Discord community
Members share and discuss middles as they appear, so you can learn which ones are worth taking.
About the Discord →Questions people ask
What is a middle in betting?
A middle is when you back both sides of a market at two bookies with different lines, leaving a gap between them. If the result lands in that gap, both bets win.
Is middling risk-free?
No. Most results miss the middle, and each miss usually costs a few dollars. The profit comes from the middles that land, which pay far more than the misses cost. It’s a high variance strategy that works over many bets.
How often do middles land?
It depends on the sport and how wide the gap is. The wider the gap between the two lines, the more often the result lands inside it. The calculator above shows how often a middle needs to land to be worth taking.
Do I need a Betfair account?
Not usually. Most middles are between two bookies. The Betfair Exchange runs line and total markets too, so it can sometimes be one side of a middle.
Which Bonusbank plan do I need?
The Middle Software is part of Pro, which includes every Bonusbank tool. You can start on the free plan to learn how matched betting works, then upgrade when you’re ready.
Give yourself a shot at the middle
Start with the free course to learn the basics, then use the Middle Software to find the gaps worth backing.
Free beginners course · No credit card needed · Takes 2 minutes