The gambler's fallacy in a streaky market
Posted: Thu Oct 29, 2026 7:44 am
After five red candles, many traders feel a green one is due. After a long run of winning trades, some believe a loss is coming. Both are versions of the gambler's fallacy, the belief that random sequences correct themselves.
Price movements are not entirely random, so trends and momentum do exist. But the belief that a streak must end because it has gone on a long time is not supported by the data. The next candle depends on the market's current conditions, not on how many came before it.
The error shows up in entries that fade a move simply because it has gone far, with no other reason. It shows up in position sizing, when a trader increases size after a series of losses on the logic that a win is overdue.
The test is to ask what evidence exists for the trade apart from the streak. If the answer is none, the trade is a guess.
A journal that tags trades by reason for entry can show how fade trades based only on streak length actually perform.
Which trades in your history were based on a sense that something was due, and how did they turn out?
Price movements are not entirely random, so trends and momentum do exist. But the belief that a streak must end because it has gone on a long time is not supported by the data. The next candle depends on the market's current conditions, not on how many came before it.
The error shows up in entries that fade a move simply because it has gone far, with no other reason. It shows up in position sizing, when a trader increases size after a series of losses on the logic that a win is overdue.
The test is to ask what evidence exists for the trade apart from the streak. If the answer is none, the trade is a guess.
A journal that tags trades by reason for entry can show how fade trades based only on streak length actually perform.
Which trades in your history were based on a sense that something was due, and how did they turn out?