UnjuicedMiddles finds different thresholds where two opposing bets can both win. A middle is defined by the gap in lines; whether it is attractive also depends on the prices, stake split, and likelihood of the result landing inside that gap.
Work through one row
- Filter to a sport, market, and books you can use.
- Read the lower Over line and higher Under line. Verify they concern the same event, stat, and settlement period.
- Inspect the Gap and list the exact results that would win both legs.
- Open Show bet plan from the row actions, or expand the available details.
- Enter the total amount or review your stake overrides. Compare the over-only, under-only, and both-win outcomes.
- Check both destination prices and rules before relying on the calculation.
Understand the return columns
| Item | Meaning |
|---|---|
| Gap | Distance between the thresholds; it is not a win probability |
| Percent / if missed | The calculated worst of the one-leg-win returns relative to total stake |
| If hit | The return if both bets win under the assumed prices and stakes |
| Bet size | The amounts allocated to the legs |
| Profit | Calculated net outcome after subtracting the combined stake |
The Middle % sort control ranks the board's calculated return metric. Do not read it as the probability that a result lands inside the gap. The bet plan is the clearest place to inspect each outcome.
Worked example
Consider Over 43.5 and Under 46.5, both priced at -110. With a hypothetical $55 on each leg, total stake is $110:
| Final total | Result | Net outcome |
|---|---|---|
| 43 or below | Under wins; Over loses | −$5 |
| 44, 45, or 46 | Both win | +$100 |
| 47 or above | Over wins; Under loses | −$5 |
Each winning $55 leg returns $105. In this simplified example, the middle would need to hit more than roughly 4.76% of the time to have positive expected value: 5 ÷ (100 + 5). That is the break-even probability implied by the payout structure, not an estimate that these particular totals will occur that often.
Prices and pushes matter
A wider gap is not automatically a better opportunity. Different sports and markets have different result distributions, and a more expensive pair can cost more when it misses.
Whole-number lines can push. If one leg pushes, its stake may be returned while the other leg settles separately under its rules. Check boundary outcomes explicitly rather than assuming the half-point example applies to every row.
The bet plan can rebalance around posted size constraints and rounding. If you override amounts, compare both one-leg-win outcomes again; they may no longer be equal.
Middle versus arbitrage
An arbitrage calculation seeks positive return across the covered outcomes. A middle often has a negative return outside the gap and a larger return inside it. Some price pairs can do both, but the gap alone does not establish that.
Troubleshooting
- The highlighted percentage is negative: inspect the if-missed outcome; that can be normal for a middle.
- The gap looks large but the payout looks poor: the prices may make the one-leg-win cost expensive.
- One leg moved: redo the full plan with the new line and price, not just the old stake split.
- No rows: clear restrictive filters and check whether compatible line gaps exist for the current slate.