There's 2 scenarios

1- open trade with no stop loss or take profit....if mstr tanks he can cash in at his leisure

If It rallies, as soon as his account can't cover the loss, margin call is triggered and he's rekt

2- open trade with sl & to.....if mstr tanks, his tp triggered and trade closed in profit

If it rallies sl triggered and loses the set amount.

Apologies in advance if you already knew this and was asking something different