Naming an emotion appears to dampen the response that drives it. The effect is small, fast, and available at the desk, which makes it one of the few techniques that survives contact with a live position.
The practical version is a sentence, said or written: I am angry about that stop-out and I want to get it back immediately. Note what it does not do. It does not argue with the feeling or promise to behave; it simply describes the state accurately, which is enough to create a gap before the next click.
Build it into the journal so it happens whether or not you remember. A single mandatory field for state after each trade makes labelling automatic, and the same field later turns out to be the best predictor of your bad trades. See tilt-triggers.
Related: emotional-regulation, behaviour-journal, tilt-triggers, cognitive-reappraisal