Why stop-out happens before the trader expects
Brokers use floating equity for margin calculations, not closed-trade balance. A position running 4% in the red counts toward stop-out even before the stop-loss order is hit. This is the same reason daily-loss-limit breaches happen earlier than the trader expects — the platform does not wait for a clean exit.
Stop-out vs stop-loss
Stop-loss is a price-level you choose where your trade exits to limit loss on that single trade. Stop-out is the broker's automatic action when your account-level margin or rule-violation threshold is hit. Stop-loss is a tool. Stop-out is a consequence.
How to never hit stop-out
Lock per-trade risk via the position-sizing formula. Self-cap daily loss at half of the firm's allowed limit. Stop trading at the cap. The sequence is identical to the sequence that prevents most challenge failures, because stop-out is downstream of the same root causes.
Related terms
Author
Maximilian Bossow
Independent prop-firm trader. Reached FTMO Platinum tier with verifiable Overall Rewards across multiple funded accounts. Founder of MB Capitals — a coaching system for traders who want to pass prop-firm challenges through structured risk management, not gurus. The proof is on the homepage: every cert, every payout, every receipt of what it took to get there.