18 January 2026 · Field note
Put the invalidation on the page before you admire the pattern
Most charts arrive at Srinagarindra Road already decorated. Circles around a neat pullback, arrows toward a recent high, a note in the margin about a moving average. The Intensive starts by ignoring the decoration until one other line exists: the price at which the idea is simply wrong. We call that the invalidation. If you cannot place it, you cannot size the idea, and the pattern is a drawing.
A level you can point at
A usable invalidation is a price the market has already shown, or a price you can define without referring to your mood. “A bit under the low” is not yet a level. “Under the low of the last day that closed back inside the range” can be checked by someone else at the table. In January a learner from Bang Phli had marked a support line through three candles and then, when asked where the idea died, pointed at a number that sat just far enough away to keep her preferred lot size. The line through the candles and the death-price were not the same. We kept the candles and threw out the death-price until she could defend it.
Crowded round numbers are the usual trap. A share hovering near 50 invites a stop at 49.5 because the figure is tidy. If 49.5 has never mattered on that chart, it is furniture. The invalidation has to be a place where the reason for the trade no longer holds. Sometimes that place is further than your preferred size can afford. Then the size changes, or the idea waits. The level does not move to protect the size.
Order of work
The order on the risk sheet is deliberate. Name the setup in your own words. Mark the invalidation. Measure the distance. Only then look again at whether the pattern is attractive. People who reverse that order talk themselves into levels. The pencil mark is the commitment; the story about the trend is the part that flatters you.
If you want to see the order applied to a chart you care about, the Saturday Rule Studio uses three shared examples, and the Desk Review uses yours. Bring the chart unmarked by arrows if you can. The first mark should be the line that would prove you wrong.