The house
Notion Keystone is a chart-preparation practice in Gyeongju. The work is technical analysis training for people who hold through swings, not through the opening hour.
The official registered business name is Notion Keystone. The business was established in 2017 in Gyeongju, Gyeongsangbuk-do.
Hae-won Choi had been marking swing charts in a private notebook since 2011, mostly after work, mostly on dailies of names she already held. In 2017 she registered Notion Keystone and opened one table on Bonghwang-ro. The first year was three evenings a week. Traders came from Daegu, Pohang, and Ulsan with charts printed the same afternoon, and the rule that still governs the room was already in force: one instrument, one frame, and a sheet that lists what was removed.
In 2019 Min-jae Park joined to lead a monthly evening. He had been sitting the private hour as a client and kept asking to see the deletion done slowly, in front of other people. The structure evening is that request, kept to six seats so the shared chart stays readable.
The studio is still at 53 Bonghwang-ro, Gyeongju-si, Gyeongsangbuk-do, 38140. The practice has not opened a second room. Growth here has meant a fuller sheet and a shorter list of lines, not a larger floor.
Leads the Chart Preparation Session and the return desk. She marks in pencil, writes the sheet in English, and will stop an hour early if the hold has not been named. Her record is fifteen years of dated desk notes from the marking table.
Runs the first Thursday sitting. He chooses the shared chart, keeps the room to one definition of a swing, and ends the night without a call. Personal pages are sent back to Hae-won’s hour.
The approach is sequential and slightly stubborn. Name the hold, choose the frame, mark the swings that govern it, keep few levels, write one volume word, close the page. Clients who want a scan of many names are pointed elsewhere. Clients who want their own crowded daily cleaned are the reason the desk exists.
We treat the chart as a craft object: paper, pencil, a copper straight-edge, and enough quiet to notice when a line is only nostalgia. The trader keeps the decision to buy, sell, or wait. Notion Keystone is a training desk. Brokerage, custody, and order routing remain with the firm you already use.
Values we actually enforce: a page you can read in a week, a written reason for every mark that stays, and a refusal to fill silence with extra lines. If that sounds sparse, it is the point of coming.