What a stop loss does
A stop loss is an order that closes your position automatically when price reaches a level you set. It caps how much a single trade can lose, at least under normal market conditions.
Without a stop, the trade stays open until you close it yourself or until your broker closes it for lack of margin. In leveraged CFD and forex trading, losses can build very quickly, and the account can be emptied before you react.
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Is a stop loss necessary?
No rule forces you to use one. Some traders use mental stops, hedges or very small positions instead. Each of these depends on you being present, disciplined and able to act at the right moment.
A mental stop does not work if:
- you are asleep, travelling or offline when price moves;
- your internet connection or device fails;
- you hesitate and hope the price will come back.
A stop placed in the platform does not depend on your attention. The real question is how much of your account you allow a single idea to lose, and who closes the trade when that limit is reached. The guides on risk per trade and stop loss placement cover how to set that limit.
Unlimited adverse moves: what "no stop loss risk" means
For a short position (selling first), price can in theory keep rising without a ceiling. For a long position (buying first), price can fall a very long way. Without a stop, nothing in your order sets a maximum loss for that trade.
Common scenarios:
- Trend against you. Price drifts steadily the wrong way for days. Each day you hold, the loss grows and swap charges may add to it (see swap fees).
- Adding to a loser. You open more positions to "average down". The account's exposure grows exactly when the market is moving against you.
- Correlated trades. Several positions on related instruments move against you together. One adverse move then hits many trades at once (see correlation risk).
The margin call path
If no stop closes the trade, the account follows a predictable sequence:
- Floating loss grows. Equity (balance plus open profit or loss) falls.
- Margin level drops. Margin level is equity divided by used margin, shown as a percentage in MetaTrader.
- Margin call. At the broker's margin call level, you get a warning. You can still deposit funds or close positions.
- Stop out. At the stop out level, the broker starts closing positions automatically, usually the largest loser first, at the prices available at that moment.
A stop out is not a planned exit. It happens at the worst point of the move and can take most of the account with it. Margin call and stop out levels depend on the account type. Check the current conditions in your broker's personal area or on its official site.
Use the calculator below to see at which prices your position would reach margin call and stop out, given your balance, lot size and leverage:
Fill in the empty fields to see the result.
Margin level = equity / used margin × 100%. Equity falls with the floating loss; the price for a level L solves balance + P/L = L × margin. Margin is taken at the entry price. In a gap the position can close at a worse price.
Try the same position with a smaller lot size or lower leverage and compare how far those prices move away. The guides on avoiding margin calls and effective leverage explain the link.
Gaps: when price jumps past every level
A gap happens when price moves from one level to another with no trading in between. This can happen over a weekend, at a market open or during sudden news. Historic examples, described without figures:
- Swiss franc, central bank decision. The Swiss National Bank removed its cap on the franc against the euro without warning. EUR/CHF fell through a huge range within minutes, and many stop orders were filled far below their levels.
- British pound, referendum night. GBP pairs fell sharply overnight as results came in, in thin liquidity.
- Pound flash crash. GBP dropped steeply in quiet Asian trading hours and recovered partly soon after.
- Oil futures. US crude futures briefly traded at negative prices near contract expiry, something many traders had never considered possible.
In such moves, a stop loss usually becomes a market order at the next available price, so the loss can be larger than planned. Without a stop, though, the position simply stays open through the move. Read more on gap and weekend risk and trading news risks.
What a stop does not guarantee
A stop loss limits damage. It does not make a strategy profitable, and it does not remove slippage in fast markets. Profit still depends on entries, exits, costs and position size. Combine stops with position sizing, a daily loss limit and a written risk management plan. You can test how stops behave on a demo account before using real money.
Frequent questions
Is trading without a stop loss always wrong?
Not always, but with leverage it leaves the maximum loss undefined. Without any exit rule, the broker's stop out becomes your exit.
Can I lose more than my deposit?
That depends on the broker's negative balance policy and your jurisdiction. Check the current conditions on the official site.
Does a mental stop count?
Only if you are present and act on it. It gives no protection while you are offline or during a gap.
Why was my stop filled at a worse price?
In fast markets or gaps, the stop executes at the next available price. This is called slippage.
Will a stop loss make me profitable?
No. It limits the loss on a single trade. Results depend on your whole approach, and leveraged trading can still lose money fast.