The problem with binary
On/off risk is a confession, not a system.
Most retail risk management reduces to two states: normal size and scared size. The trader runs full risk until something hurts, then halves everything until the fear fades. Neither transition is measured. Neither is logged. Both are driven by the most recent trade rather than by the state of the account or the quality of the evidence. The binary switch fails because deployment decisions carry more information than one bit — an account can be healthy but the week's evidence weak, or wounded but the structural diagnostics clean. A two-state model forces those very different situations into the same posture. The tier ladder exists to give each distinguishable situation its own deployment answer, so the response to pressure is graduated rather than panicked.

