How the floor moves
Equity is cash plus held contracts valued at available bid marks. Higher fully fresh marked equity raises the high-water mark. The floor is that high-water mark minus a fixed $600. It never moves down and continues trailing above the starting balance.
The starting floor is $9,400. A $10,300 high-water mark produces a $9,700 floor. It is not six percent of each new equity high.
What a breach does
Equity at or below the floor breaches the evaluation. The simulator cancels waiting commands, locks the account and schedules liquidation. A stale, halted or thin market can leave a close unavailable or only partially completed, with liquidation still pending.
The floor is a threshold, not a guaranteed sale price or minimum balance. Frozen marks do not protect the account from later losses or risk checks.