The Martingale Strategy Explained (With Real Numbers)
October 6, 2026 · 7 min read
The martingale is one of the oldest money-management systems in trading and betting. The idea is simple: after every loss, you increase the size of your next trade so that one win recovers everything you lost and still leaves a small profit. It feels safe, because most series end with a win. This article explains how it works, shows the real numbers, and explains why the rare losing series matters more than all the small wins.
How the martingale works
In its classic form, you double your stake after each loss. With a fixed-payout trade, where you either win a set percentage of your stake or lose the stake, doubling is not quite enough, because the payout is less than 100%. You have to increase each trade by a little more than double to cover the earlier losses.
With a payout of 92%, each step must be about 2.09 times larger than the step before it. A group of steps is called a series. The series ends as soon as you win, or when you reach the last step and lose.
A worked example
Say you set aside $100 for one series of 3 trades, with a 92% payout. To use exactly that $100 across the 3 steps, the trades are:
| Step | Trade size | Total risked so far | Profit if this step wins |
|---|---|---|---|
| 1 | $13.44 | $13.44 | +$12.36 |
| 2 | $28.04 | $41.48 | +$12.36 |
| 3 | $58.52 | $100.00 | +$12.36 |
Notice two things. First, whichever step wins, the profit for the series is the same: about $12.36. Second, if all 3 trades lose, you lose the full $100. You are risking $100 to make $12.36.
Adding more steps makes a full loss less likely, but it also shrinks the profit. With the same $100 spread over 4 steps, the profit per winning series drops to $5.57. With 5 steps, it drops to $2.59.
Why it feels like it always works
If each trade has a 50% chance of winning, the chance of losing 3 in a row is 12.5%. That means about 7 series out of 8 end with a win. Many traders try the martingale, win several series in a row, and conclude that it works.
But a 12.5% chance is not rare when you repeat it. Over 10 series, the chance that at least one of them is a full loss is about 74%. Over 20 series, it is about 93%. The losing series is not a question of “if”. It is a question of “when”.
The math that matters: expected value
Expected value tells you what you make on average per series if you repeat it many times. For the 3-step example with a 50% win rate:
- 87.5% of the time you win $12.36
- 12.5% of the time you lose $100
On average, that is a loss of about $1.68 per series. The many small wins do not make up for the occasional large loss.
This is the key point: a martingale does not change your edge. It only changes the shape of your results, from many small ups and downs into many small wins and a few large losses. With a 92% payout, each trade breaks even at a win rate of about 52%. If your real win rate is below that, the martingale loses money over time, just more slowly at first. If your win rate is above it, you were already profitable, and the martingale adds a lot of risk on top.
How to use a martingale more safely
No sizing method makes trading safe, but some rules limit the damage:
- Only put money you can afford to lose in one series. In the example above, “capital” is not your whole account. It is the amount you are willing to lose if the series fails.
- Decide the number of steps in advance, and never add a step in the middle of a series to “save” it.
- Set a daily target and stop when you reach it. The longer you keep going, the more likely you are to meet the full losing series. See how to set a daily profit target.
- Stop for the day after a full losing series. Trying to win it back right away is how a bad day becomes a disaster. See why you should take a 24-hour break.
- Track every session so you know your real win rate instead of guessing. See how to keep a trading journal.
The bottom line
The martingale turns many small wins into one large loss that arrives eventually. It can be used as a structured, disciplined way to size trades, but only with strict limits: a fixed amount per series, a fixed number of steps, a daily target, and a hard stop after a loss. Used without those limits, it is one of the fastest ways to empty a trading account.
Risk warning: This article is for education only and is not financial advice. Trading involves a high risk of loss. Only trade with money you can afford to lose.
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