12 August 2026 · 7 min · Seo Siwoo
When a quiet range fails in the first minutes
On the Range Desk we pin the prior session before anyone talks about the new day. High, low, and a box around the congestion that actually held, not every wick that poked out for a minute. Students who watch Kospi futures, and the few who bring USD/KRW, often arrive with a tidy drawing. The trouble starts in the first minutes, when one bar runs through both edges and the tidy drawing suddenly looks foolish.
A pierced edge is a mark on the sheet, not a verdict. Evening five is built around this. We wait for the bar to finish. If it closes back inside the prior range, the drawing stays and we note the poke. If it closes outside and the next bar holds out there, the range is abandoned and the sizing line is redrawn from the new distance, not from the old box we liked.
The mistake we see most often is loyalty. Someone spent twenty minutes shading a quiet afternoon, so they defend it against the open. The worksheet has a line that says “abandoned” for that reason. Writing the word is part of the training. It keeps the pencil honest.
Position size does not jump because the first bar was exciting. Until the range is either accepted again or clearly left behind, the practice unit on the sheet stays at the small figure from evening four. Students who already trade live are asked to treat that as a classroom rule they can compare with their own habit later, at home, away from Jeju-daero.
If you want a single place to rehearse this, the October open evening takes a related question: a morning that is already wider than the week. The six-evening desk is where the abandon line becomes a habit rather than a one-night idea.