Margin call

The executing-trades page says the account line turns red in a margin-call or stop-out state. It does not define the percentage. That is set for the account. COBS 22.5 reminds firms that the client's-best-interests rule and the best-execution rule apply when they make a margin call to a retail client. The same section says the firm must close positions when net equity falls below 50% of required margin. A call does not replace that close-out. Adding funds after a call is the client's decision. This page does not say when to add them.