Saturday · four hours
Position-sizing clinic
For people who can already box a range and still choose a quantity by mood. Three of your own sessions, one sizing card, a wide-range case at the end. ₩240,000.
Jeju studio · evening sittings
Six evenings with a range, a ruler, and a seat size.
Reserve a Range Desk seatThe next desk opens Tuesday 6 October 2026, in the room at 77 Jeju-daero.
01 — a Tuesday
The lamp goes on at half past six.
Students take the same chairs they used last week. Prints stay in a copper tray until the prior session’s high and low are on the sheet. Seo Siwoo reads the range back aloud. If a neighbour cannot find the same two prices, the mark is redrawn before anyone mentions a position.
Volatility, in this room, is a distance. A wide morning changes the stop. A longer stop changes the quantity. The arithmetic is slow on purpose, because most of the people who come already know how to click a buy and still size the trade from the feeling of the last one.
The studio is a single room on Jeju-daero. Eight seats face a lacquered wall long enough for one session chart. Instruction is in English. Tea is poured at the break, and the door closes again so the second half belongs to the worksheet, not to the street.
Orders are placed by the student, later, with their own brokerage. The desk ends at 21:00 with pencils down.
02 — the long sitting
The Range Desk
Six evenings across three weeks. You bring one market you already follow. You leave with a booklet: a range a stranger could check, a volatility line that says whether the day is already spent, and a position size written from a stop distance you chose.
₩890,000 per seat
Eight seats. Tuesdays and Thursdays, 18:30 to 21:00. The October desk runs from 6 October through 22 October 2026.
Read the six evenings03 — other chairs
Shorter ways to sit.
Wednesday or Friday afternoon
Chart sitting
Ninety minutes, one student, pencil on your prints. You leave with marks and a single sizing line. ₩180,000. Range Desk students may use their included follow-up here.
One topic · twelve seats
Open evening
A single night on one question. October’s evening asks what to do when the morning range is already wider than the week. ₩75,000, and a fair way to hear the pace before the long desk.
04 — from the table
Eighteen points, and the unit stayed small.
Min Jae-hwan came from Seogwipo with five years of Kospi futures and a habit of adding after a quiet morning. On evening four the example stop landed at 18 points. He wanted the larger quantity. The sheet kept the smaller one, because he left the risk amount untouched. The longer account of that week is with the other letters.
05 — the room
Find the studio after the light drops.
The door is on Jeju-daero, a short walk from the city hall side of the avenue. Studio hours run Tuesday to Friday, 13:00–21:00, and on clinic Saturdays from 10:00. Sundays and Mondays the room is dark.
77 Jeju-daero, Jeju-si, Jeju-do, 63241
06 — recent notes
From the worksheet margin.
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When a quiet range fails in the first minutes12 August 2026
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ATR is a ruler for distance28 July 2026