Definition of Stop Out
The level at which a broker automatically closes your positions because your margin level has fallen too low (typically 20–50% margin level). Stop out protects both you and the broker from negative balances.
At a glance
Example
Example: $1,000 equity and 1% risk = a $10 cash cap. Size from “Stop Out” and stop distance, not from a gut-feel lot size.
Common mistake
Common mistake: confusing “Stop Out” with advertised max leverage — leverage alone does not set risk per trade.
Professional tip
Tip: write a cash daily loss limit independent of “Stop Out”, then let the definition set size only inside that ceiling.