Why the first Saturday is still a pencil and a printed TPO

Software will draw a profile in a second. We still make people letter the first day by hand so the count, not the colouring, is what they trust.

The count is the lesson

On Saturday one at Vault Canvas Hub, nobody opens a charting package. Each person receives a sheet with price down the left and time across the top, already ruled. The work is to drop a letter in each thirty-minute bracket that traded at that price. A is the first bracket, B the second, and so on. By the time you reach K or L on a SET morning, your hand knows which row grew longest.

That longest row is the point of control for the session — the price where the auction spent the most time. Saying the sentence is easy. Feeling it in the fingers after forty minutes of lettering is the reason we still print the page.

What the overlay hides

A volume or TPO overlay on a screen is a finished object. It arrives coloured, with a value area already boxed. Students then treat the box as a support line. In the Silom room we have watched that habit form in under an hour when we start on a laptop.

Lettering forces a different question: which letters sit inside the 70 percent that market profile calls value, and which letters are the tails? You cannot answer until you have counted. The value area is a statistic of that day’s distribution, not a shelf waiting for the next session to bounce.

When we do allow a screen

After the four Saturday mornings, some people join the Wednesday reading circle. There we still print the histogram, but we will put a projector up for one comparison — time value versus volume value on the same day. Even then, marks go on paper. The classroom is not a trading floor, and we keep it that way so the argument stays about the finished auction.