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Trading Strategies

What Is Martingale, and Why It Empties Accounts

Martingale doubles the size of a trade after every loss so that the first win pays back everything lost and one unit more, and it empties accounts because the stake and the loss double together while the prize stays one unit and the account does not double at all. This paper shows you the rule's eight steps, the idea as grains on a chessboard, a real run of seven red days on the Nasdaq in August 2025, the bill after three, five, seven and nine losses at a stake of 100 dollars, and the margin level on your platform where the doubling is stopped from outside.

Difficulty
Beginner
Reading time
5 min
Pages
8
Reviewed by
Saman Rahbar

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The rule, step by step

Martingale is a rule for size, not for direction: double the size after every loss, so that the first win pays back everything lost and one unit more. Start with one unit. After seven losses in a row the sizes have been 1, 2, 4, 8, 16, 32 and 64, which have cost 127 units together, and the eighth trade is 128 units. If it wins, it pays back the 127 and leaves one unit ahead. If it loses, the ninth trade is 256, and the run has cost 255 units for a plan that was never going to make more than one.

Grains on a chessboard

Picture the old story of grains on a chessboard: one grain on the first square, two on the second, four on the third, doubled on each square after, and by the end of the board more grain than the kingdom held. A martingale is the same board, walked one square per loss. Doubling looks harmless for six squares, because the numbers are small. It is the seventh and eighth that no purse holds, and a run of seven losses is a thing every chart has in it.

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