Moving a stop to breakeven after a small profit feels safe. The trade can no longer lose, so what could go wrong?
The problem is that it often kills trades that were about to work. Price retraces to the entry, the stop is hit for zero profit, and then the original move resumes. The result is a string of scratch trades, with the costs of spread and commission paid on each.
The effect is large for scalpers, because normal noise often takes price back to the entry area. A tight breakeven stop converts potential winners into small losses.
The data usually shows it. Compare results for trades where the stop was moved to breakeven against similar trades where it was left in place. Include costs.
Some traders find a compromise, such as moving the stop to breakeven only after a larger gain, or placing it slightly beyond breakeven in the profit direction, so the trade still leaves room to breathe.
Another variant is the partial move: shifting the stop to a fraction of the initial risk, such as half, once the trade has moved a certain distance. It leaves room for noise while reducing the potential loss, and it can be tested separately from the full breakeven rule.
What does your data say about moving to breakeven early versus leaving the original stop alone?