Martingale in Trading: Why Doubling Down Always Ends the Same Way
The arithmetic of doubling after a loss, how many steps it takes to wipe an account, and why a beautiful equity curve from a martingale EA means nothing.
Martingale comes from betting: double after a loss and the first win returns everything plus one unit. In a casino it fails because of table limits and the zero. In trading it fails because of account size.
The arithmetic
Starting size 0.01 lots, $1,000 account, averaging every 30 pips.
| Step | Size | Cumulative | Loss on the next 30 pips |
|---|---|---|---|
| 1 | 0.01 | 0.01 | $3 |
| 3 | 0.04 | 0.07 | $21 |
| 5 | 0.16 | 0.31 | $93 |
| 7 | 0.64 | 1.27 | $381 |
| 9 | 2.56 | 5.11 | $1,533 |
By step nine the account is closed at stop-out. In total the market moved 270 pips in one direction — an ordinary day on GBP/USD.
Why the curve looks so good
Martingale produces a very high win rate — 90–97%. The equity curve climbs in a straight line for months. Those are exactly the screenshots that get sold.
The problem is that the curve hides the one thing that matters: the size accumulated in the currently open series. When that series turns critical, the account disappears in a day.
What to do instead
If your strategy adds to positions, two limits become mandatory: a maximum number of additions (usually no more than three) and a total stop for the whole series as a percentage of the account. Without them, adding becomes martingale regardless of what it is called.
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Frequently asked questions
Does martingale work in forex?
It produces a long series of small wins and one catastrophic loss. Expectancy is negative, and worse still once spread and swaps are counted.
How many losses can a martingale account absorb?
Starting at 0.01 lots on a $1,000 account, doubling survives roughly seven to nine steps. A ten-step run against the position is an ordinary event on any timeframe.
How is averaging different from martingale?
Averaging adds equal size and usually has an exit plan. Martingale increases size geometrically. The second destroys accounts far faster, but the first is dangerous too without a hard cap.
- Min. deposit
- $50
- Spread
- from 1.0 pip (Standard STP)
- Commission
- $3 per lot per side (Raw ECN)
CFDs are complex instruments with a high risk of losing money
- Min. deposit
- $100
- Spread
- from 1.1 pips (Standard STP)
- Commission
- $3 per lot per side (Raw ECN)
CFDs are complex instruments with a high risk of losing money