New students often arrive with charts that look like ruled exercise books: a line on every wick extreme. The first correction we teach is to zoom out until several touches share a neighbourhood of prices, not a single tick.
A zone acknowledges that orders rest in a range. Retail, desks, and algorithms do not share one limit. When you insist on one line, the first wick through it feels like a break. When you have a zone, that wick is information about who is still defending the area.
In class we use a pale highlighter band first, then a firmer line only if the tape has shown a clear decision price inside that band. The line is a hypothesis. The zone is the evidence.
Practice this on daily charts of liquid FX pairs before you try it on a five-minute index future. The habit of drawing fewer, wider marks is the fastest way to stop arguing with noise.