A screenshot saves the chart at the moment of a trade. Later, you can judge your decision against the real context instead of a fuzzy memory.
💡Pro insight
A screenshot freezes the context you actually saw. Without it, hindsight rewrites the story — the setup that "looked perfect" was, on the chart, marginal at best.
⚠️Warning
Screenshotting only your winners builds a flattering, useless archive. The losers and the skipped trades are where the real lessons hide.