Stop-loss limits in betting, with real numbers
A daily stop-loss caps how much you can lose in one session. We test a 5-unit limit on two bad days from the BAI8 record and show what it saves and costs.
A stop-loss is a limit you set before you start betting, for example 5 units in a day, after which you stop for that day. It does not make any bet better or worse. What it does is cap how much one bad session can cost and take the next decision out of your hands at the moment you are least fit to make it. Below, we test a 5-unit daily stop-loss on two of the worst days on our own record.
How it works
- Pick a unit, for example 1% of your betting bank.
- Pick a limit in units, for example 5, before the first bet of the day.
- Add up results as they settle. When the running total reaches −5, stop.
- Start again the next day at your normal stake, not a bigger one.
Step 4 matters most. Raising stakes to win back a loss is chasing, and we show what that does in chasing losses: what it does to a bankroll.
Two bad days on the BAI8 record
We took every settled call on the record, one unit each at the price on the card, in kick-off order.
| Day | Calls | Day's result | Stop at −5 after | Total at the stop | Saved by stopping |
|---|---|---|---|---|---|
| Saturday 24 October | 35 | −5.76 units | 16 calls | −5.08 units | 0.68 units |
| Friday 9 October | 9 | −6.27 units | 8 calls | −5.27 units | 1.00 unit |
On 24 October the running total fell as low as −10.73 units during the afternoon before later wins clawed back almost five. The stop-loss spared you that second half of the slide, and also the recovery. Where several games kick off at once, the order between them is arbitrary, so the exact call at which the limit bites could shift by one or two.
What it costs
Across all 396 settled calls with a price, the record is +27.05 units at one unit each. If those calls have a real positive edge on average, every call skipped after a stop is a small expected profit given up. If they do not, every call skipped is a small expected loss avoided. The stop-loss cannot tell which; it is a limit on variance and on behaviour, not a strategy. How deep normal losing runs go is in betting drawdowns: how deep a dip goes.
What this does not tell you
Two days are an illustration, not a test. A 5-unit limit is an example, not a recommendation for your bank; the right figure is the most you could lose in a day without it changing how you bet the next day. If you find you keep moving the limit, that is a sign to stop for longer, and free help is available from organisations such as GamCare and BeGambleAware in the UK.
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Common questions
What is a stop-loss in betting?
A limit you set before you start, such as 5 units in a day, after which you stop betting for that day whatever happens. It caps the damage of one bad session.
Does a stop-loss make betting more profitable?
No. It does not change the expected value of any single bet. If your bets have a positive edge, stopping early slightly lowers your expected profit; if they do not, it slightly lowers your expected loss. What it does is cap a bad day and stop decisions made while chasing.
What would a 5-unit stop-loss have done on the BAI8 record?
On 24 October it would have stopped after 16 of 35 calls at −5.08 units; the day finished at −5.76, so it saved 0.68 units. On 9 October it would have stopped after 8 of 9 calls at −5.27; the day finished at −6.27, saving 1 unit.