The Inner Thresholds: 10% and 90%

C is slow. It sits in the middle of the range, and price has to cross half the box to flip it. That is its strength — a bias that changes rarely is a bias you can lean on — but it means C says nothing about what is happening at the edges, and the edges are where the interesting things happen.

This chapter adds two levels near the edges that move fast. They tell you when the inner boxes’ sentiment has flipped, often while C still points the other way.