Example 1: Trading tired
A trader sits down exhausted and wired after a bad night and a stressful morning, but trades their normal size as if nothing were different. In that state they miss obvious signals, react instead of think, and make a series of sloppy decisions that a rested version of them would not have. The setups were the same; the operator was degraded. A trader who checked in, recognised the poor state, and either traded a fraction of normal size or took the day off, would have skipped the entire avoidable loss. The state, not the market, was the risk that day.
