Martingale in gold trading
Martingale is a sizing method that doubles the position after each loss to recover all losses with one win; on gold it fails when a trend runs long enough.
Also called Martingale strategy, Doubling down, Loss recovery sizing
Martingale is a betting system in which the stake is doubled after every loss, so that the first win recovers all previous losses plus one unit of profit. In trading it appears as doubling the lot size after a losing trade, or adding ever-larger positions as price moves against you.
How it applies to gold trading
Martingale produces many small wins and a smooth equity curve, which is why it is common in commercial gold EAs. The catch is that losses grow exponentially. Gold regularly trends $50 to $100 in one direction over a few days, enough to run through a long doubling sequence. When it does, the required size exceeds the account’s margin, a stop-out closes everything and months of small gains disappear.
No sizing rule can turn a strategy without an edge into one with an edge. Martingale only changes the shape of the results: frequent small wins, rare catastrophic losses.
Worked example
Example (hypothetical numbers): start at 0.01 lots with a $5 stop, doubling after each loss. After six losses the next trade is 0.64 lots and the total lost so far is $5 × 100 × (0.01 + 0.02 + 0.04 + 0.08 + 0.16 + 0.32) = $315. With a $5 target, the seventh trade risks $320; if it wins, it recovers the $315 lost and nets just $5. If it loses, the total loss becomes $635, all in pursuit of that $5.
A common mistake
Judging a martingale EA by its win rate or a few months of results. Ask what happens on a $100 trending move against it.
See also: Grid trading, Averaging down, Risk of ruin, Expert advisor.
Frequently asked questions
Does martingale work on gold?
It wins often but eventually meets a trend long enough to wipe out the account. It does not create an edge; it hides risk until it arrives at once.
How can I spot a martingale EA?
Look for lot sizes that grow after losses, many open positions in one direction and a very high win rate with a smooth equity curve.