Set the number BEFORE you trade
A common rule: max daily loss = 3× your normal per-trade risk. If you normally risk 0.5% ($250 on a $50k account), your daily stop is around $750.
Why
Losses lead to tilt. Tilt leads to revenge trades. Revenge trades lead to blown accounts. The daily stop is a circuit breaker before that happens.
Enforce it
Physically close the platform. Take a walk. Journal what happened. Come back tomorrow — the market will still be there.
