Martingale Robots: Why They Blow Up

Martingale doubles size after every loss, assuming that sooner or later one win covers the whole series. We ran the scheme across twelve pairs to see how it ends on real data rather than in argument.

What exactly was simulated

A deposit of 10,000 units, a base risk of 100 per trade — one percent. Entry long every bar with a 30-pip target and stop. Size doubles after a loss and returns to base after a win. No filters and no indicators: what interests us is the behaviour of the position-sizing scheme itself, not the quality of the entry.

The simulation in numbers

• Deposit destroyed on 10 of 12 pairs
• Longest run of consecutive losses — 8, median across pairs 7
• Size multiplier reached 128x base
• Surviving pairs (GBPJPY, USDCAD) grew from 10,000 to roughly 38,000

The simulation was run over 518 daily bars for each of 12 pairs using the same code as the portal's other calculations. The data is open and the script is in the repository, so the run reproduces.

Ten accounts out of twelve

The scheme destroyed the deposit on ten pairs out of twelve. The longest losing streak reached eight, and the size multiplier reached 128 and 256 times base. That is where the scheme breaks: an eighth consecutive loss requires staking 128 times the initial risk — the entire deposit and more — and the account simply does not survive to reach the ninth trade that supposedly returns everything.

The two survivors are the most dangerous part

Two pairs did not blow up, and on them the deposit grew almost fourfold — from 10,000 to roughly 38,000. That is precisely the mechanism by which martingale is sold: it genuinely produces an impressive curve until it meets its series. The owner of such an account would have watched steady growth for two years and had every reason to consider the scheme sound — right up to the day it stopped being so.

Why settings cannot fix it

Capping the number of doublings turns martingale into an ordinary fixed-risk system and removes its entire point. Increasing the deposit postpones the catastrophe without cancelling it: a run of ten losses needs a multiplier of 512, twelve needs 2,048. Every finite deposit has a series that kills it, and series in markets are not bounded from above by anything.

What the simulation really shows

Not that martingale sometimes loses — but that its winning and losing scenarios are indistinguishable until the very end. The scheme gives no warning: until the final series the curve looks exemplary. That makes it more dangerous than any straightforwardly unprofitable strategy, which loses gradually and gives you time to stop.

This material is educational and is not individual investment advice. Backtested results do not guarantee similar results in the future. Trading forex carries the risk of losing capital.