Read the histogram before you wait for the cross

Crosses are loud. Histogram decay is quieter and usually earlier. In the MACD Cross Lab we pause the projector when bars get shorter on the same side of zero, and we ask the room to say what would have to happen for a cross to matter.

A common Bangkok-desk habit is to treat every cross as a change of character. On ranging names, that habit fills a journal with noise. We would rather see three notes: histogram peak, histogram shrink, then the cross — and only then a plan that mentions invalidation in price, not in the oscillator.

Students who arrive from video courses often want a setting change when the histogram looks messy. We keep classroom defaults until someone can say, out loud, what the new lookback is meant to hide.