Nalinee Prasert ·
Size the loss while the market is still quiet
Position size belongs to the range, not to the breakout candle. How we fill the worksheet in Khlong Toei before anyone talks about entry.
Most of the damage I see is not from a wrong level. It is from a share count chosen after the candle that 'looked like go'. By then the stop has to sit further away, so the same baht of risk buys fewer shares — or, more often, the trader keeps the large size and hopes.
In the risk sitting we do the arithmetic while the range is still a rectangle on paper. You name the invalidation: a close back inside, or a close below the last higher low, or whatever rule you will actually obey. You measure that distance. You name the baht you will allow that idea to cost. The share count is then a division, not a mood.
People dislike this because it makes a small breakout look small. Good. A tight range with a close stop can still be a full unit. A wide coil that would cost two weeks of planned risk on one failed close is not a 'bigger opportunity'; it is a pass, or a half unit, written in advance.
We also write a daily halt. Two failed breaks in a morning in Bangkok, especially when you are also watching the US open from this timezone, is enough. The halt is a time on the clock and a number of attempts, not a feeling of being tilted.
Bring a pencil. Ink comes after you have said the numbers aloud. If you cannot say them, you do not have a plan yet, and I will not pretend the sheet is finished.