Stop out price explained: broker liquidation meaning
By Ken Chigbo, Founder, KenMacro. Published 2026-05-13.
Quick answer
The stop out price is the level at which a broker automatically closes a trader’s open positions because the margin level has fallen below a defined threshold. It is a forced liquidation mechanism, not a discretionary action, and it protects the broker from negative client balances during fast or gapping markets.
What is stop out price?
Stop out price refers to the specific market level, expressed through the margin level percentage, at which a broker’s risk system begins force-closing a client’s open positions. Most retail brokers set stop out somewhere between 20 and 50 percent margin level, though the precise figure varies by firm and account type. Once equity divided by used margin breaches that ratio, the system closes the largest losing position first and continues until the margin level recovers above the stop out threshold. The mechanism is automated, applied without warning beyond the prior margin call, and operates independently of the trader’s intent.
How traders use stop out price
Retail traders monitor stop out levels because they define the absolute boundary of position survival during adverse moves. The desk treats stop out as a structural constraint when sizing positions: a trader running close to the margin call threshold has almost no buffer against ordinary volatility, let alone news spikes or weekend gaps. Institutional desks rarely encounter broker-side stop out because they operate on prime brokerage credit lines, but proprietary trading firms and funded account programmes apply equivalent internal rules. Practically, traders calculate the distance in pips from current price to stop out for each open position, then compare that distance against the average true range of the instrument. If stop out sits inside one daily range, the position is structurally fragile.
Common misconceptions about stop out price
A frequent misunderstanding is that stop out triggers at a fixed price level on the chart. It does not. Stop out is a margin level event, meaning it depends on equity, used margin, and floating profit and loss across every open position, not on a single instrument’s price. Another error is assuming the broker closes all positions simultaneously. Most systems close the largest losing position first, then re-evaluate, repeating until the margin ratio recovers. Traders also confuse stop out with margin call: margin call is a warning, stop out is the execution. During fast markets, slippage can push the actual liquidation worse than the calculated level.
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Frequently asked
What is the difference between margin call and stop out price?
Margin call is a warning notification from the broker that the account’s margin level has dropped to a defined threshold, often 100 percent, signalling that further losses risk forced closure. Stop out is the lower threshold at which the broker actually begins liquidating positions automatically. Margin call gives the trader an opportunity to deposit funds or close positions voluntarily, whereas stop out removes that discretion. Both are defined in the broker’s terms and conditions and vary by firm.
Can I lose more than my deposit when stop out triggers?
Under normal conditions, stop out is designed to close positions before the account balance turns negative. However, during extreme volatility, weekend gaps, or central bank shock events, slippage can push the executed liquidation price beyond the calculated stop out level, producing a negative balance. Many retail brokers regulated in the UK, EU, or Australia offer negative balance protection for retail clients, meaning the firm absorbs the deficit. Professional clients typically do not receive this protection.
How can traders avoid hitting the stop out price?
The practical approach is conservative position sizing, monitoring the margin level continuously, and using protective stops well above the stop out threshold. Traders should calculate how much adverse movement the account can absorb before margin call triggers, then size positions so that ordinary intraday volatility does not threaten that buffer. Reducing leverage, avoiding concentrated exposure across correlated pairs, and closing positions before high-impact news releases all materially reduce the probability of forced liquidation.
Do all brokers use the same stop out percentage?
No. Stop out levels vary considerably across brokers and account types. Some firms set stop out at 50 percent margin level, others at 20 percent, and a few operate tiered systems where the percentage depends on account size or instrument category. Regulated jurisdictions sometimes mandate minimum levels: under ESMA rules, retail accounts in the EU must be closed at 50 percent of initial margin. Traders should read the specific broker’s contract specification before opening positions.
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