Example 1: Two responses to the same losing streak
Both traders take two planned losers to start the day. Trader A feels the urge to get even, doubles size on a setup that is not in the plan, loses again, and within an hour has breached the daily loss limit and is trading purely on emotion. Trader B feels the same urge, recognises it as the tilt signal, and invokes the walk-away rule: steps away for twenty minutes, reviews whether the two losses were bad trades or just normal variance on good ones, and returns only to take the next genuine setup at normal size. Same start, same emotions; the difference is that B had a mechanical gate and used it. The setups did not separate these two traders. The guardrails did.