ARMFStop-loss
A stop-loss is an order to close a position once a set price is reached. Its point is not to «save the trade» but to make the loss a matter of calculation rather than of a decision taken at the moment the position is already in the red. We take apart the mechanics of execution, the types of orders and the typical mistakes.
What a stop-loss is in forex trading
A stop-loss is a conditional order that sits on the broker's server and fires when the price reaches the level you named. Once it fires, it turns into a market order and closes the position at the nearest available price. There are two key properties: it fires without your involvement, and it is known before the entry into the trade.
That is exactly why a stop cannot be kept «in your head». A mental level is not executed automatically, and at the moment it is touched a trader always finds a reason to wait: the price might come back after all. Sometimes it does — and that is the most expensive experience of all, because it cements the habit.
Three things a stop order does
- It fixes the loss in money before the entry
- The distance to the stop together with the volume gives an exact amount: it is known before the entry and does not change depending on where the price goes.
- It frees you from a decision at an awkward moment
- The decision is made in advance, in a calm state. When in the red, a person systematically overestimates the chance of a recovery.
- It makes the statistics comparable
- If losses are limited by the same value, the results of trades can be counted in R and give a meaningful win rate and expectancy.
Stop-loss and stop-limit: how a stop-market differs from a limit order
One of the most frequent places of confusion. Both orders fire once the trigger price is reached, but after that they behave differently, and the difference is critical precisely in a fast market.
| Stop-market (an ordinary stop-loss) | A stop-limit | |
|---|---|---|
| What happens on the touch | A market order is sent | A limit order is placed at the price you named |
| Guarantee of execution | The position is closed almost for certain | There is no execution if the price has gone past the limit |
| Guarantee of price | No: slippage is possible | Yes: it will not execute worse than the named price |
| Behaviour on a gap | It will close at the first available price, the loss is larger than calculated | It may not execute at all, and the position stays open |
| Where it is appropriate | Limiting a loss — the main case | Situations where the price matters more than the fact of closing |
A practical conclusion. Limiting a loss requires a stop-market. A stop-limit looks more attractive — «no worse than this price» — but in the very scenario the stop is set for it turns into an absence of protection: the price shot past the level, the limit order hangs unexecuted, the position is open and the loss grows.
The stop-loss and the position size are one decision, not two
A stop in pips on its own does not limit the loss in money: the same stop on a different volume costs different amounts. The limit appears only in the pair «stop level + volume», and the order of calculation inside that pair is fixed.
The price at which the idea of the trade stops being valid: beyond the structure, beyond the extreme, beyond the edge of the range. It is an input, not the result of a calculation.
step 1The difference between the entry price and the stop level. The spread is added to it if it is noticeable against the size of the distance.
step 2Equity × the risk percentage. It does not depend on the particular trade and is not revised for the sake of a «convenient» volume.
step 3The risk amount ÷ (distance × pip value), rounded down to the volume step. Rounding up already means going beyond your own limit.
step 4Four mistakes with the stop that cost the most
First the lot is chosen, then a place for the stop is looked for somewhere closer. The level stops being the level that cancels the idea and ends up inside ordinary noise.
the order of calculationThe only direction in which a stop may be moved is towards profit. Moving it further away means the actual risk is larger than planned, and the statistics of the system stop being true.
a broken ruleA cluster of orders in one point is a place where the move often goes exactly to that point and back. A small step beyond the level is cheaper than a position knocked out.
a cluster pointA short stop is executed at a price that includes the spread: the declared 10 pips turn out to be 11–12 in practice. On a long stop the difference is unnoticeable, on a short one it is a tenth of the risk.
costs inside riskFrequently asked questions
What is a stop-loss in simple words?
It is an instruction placed with the broker in advance to close a position if the price has reached the level you named. It is executed automatically and defines the maximum loss on the trade before the trade is even opened.
Is a stop-loss a limit order or a market order?
An ordinary stop-loss is a stop-market: when the trigger price is touched, it turns into a market order. There is also a stop-limit, which places a limit order, but it does not guarantee that the position will be closed and is a worse fit for limiting a loss.
Does the broker see my stops and can it «hunt» them?
Stop orders are stored on the broker's server, so technically it does see them. But mass clusters of stops appear in obvious places — beyond round levels and local extremes — and a move towards them is explained by the behaviour of all participants, not by the actions of one particular broker. The practical conclusion is the same under both explanations: do not put the stop at the most obvious point.
Can a stop be used on spot rather than on futures or CFDs?
The mechanics of the order are the same everywhere the broker supports conditional orders. What differs is something else: on a margin account the absence of a stop leads to a forced close on the stop-out, while without leverage a position can stay open for as long as you like, and the loss is limited only by the size of the investment.
How far away should the stop be placed?
As far as it takes for the level to sit outside the instrument's ordinary noise — and the volume is fitted to that distance, not the other way round. Practical ways of choosing the level are taken apart in the article where to place a stop-loss.
How do you place a stop-loss in the terminal?
The position-opening window has the Stop Loss and Take Profit fields — the levels are set in the same place as the volume and go to the broker's server together with the order. For a position that is already open, the level is added by modifying it. The main thing is that the order is a server-side one and not a delayed action of the terminal.
How many pips should the stop be on EUR/USD?
There is no universal number: the distance is set by the structure of the chart and by volatility. A reference point for checking is the ATR: a stop shorter than a third of the average daily range is almost certainly inside ordinary fluctuations and will be taken out by a random move.
What do I do if the stop keeps getting hit and then the price goes my way?
That is a sign that the level sits inside the noise. It is checked with two figures: the distance of the stop in fractions of the ATR and whether the level was tied to the structure — an extreme, the edge of a range. The solution is a more distant stop and a proportionally smaller volume, not giving up the stop.
Do I need a stop-loss if I trade intraday and watch the chart?
Yes. Being at the monitor does not replace the order: at the moment of a sharp move the decision is made in seconds and usually in favour of waiting. On top of that, a lost connection or a frozen terminal leaves the position without protection exactly when it is needed most.
Can the stop be set as a percentage of the deposit?
No, that substitutes one concept for another. A percentage of the deposit is the risk, that is, the amount of the loss. The stop is a price level where the idea of the trade stops working. What links them is the volume: it is picked so that the distance to the stop costs exactly the planned percentage.
Do other participants see my stop?
The particular order — no. But clusters of stops in obvious places — beyond round levels and local extremes — are predictable, and the price often goes exactly there. There is one practical conclusion: a small step beyond the level is cheaper than a position knocked out.
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