Risk management · Intermediate

Stop Losses

Where a stop loss belongs, why it has to be decided before entry, and the one habit that turns a small planned loss into a large unplanned one.

Last reviewed 15 September 2026 by the MarketPro research desk · Editorial policy

In short

A stop loss belongs at the price that proves your trade idea wrong, which is usually just beyond the swing high or low that defines the setup, or one to two times ATR away when structure is unclear. Decide it before entry, place it as a hard order with the entry, and derive your position size from its distance. Never widen a stop to fit a bigger position.

What to remember

Without a stop distance you cannot size a position, which means you cannot know what the trade can cost you.
Structure sets the stop, and the stop sets the size. Choosing the stop to justify a larger position inverts the logic entirely.
Moving a stop away from price is the most expensive habit in retail trading. It works repeatedly, then once it does not.
A stop is an instruction to exit at market, not a promise of that exact fill. Gaps and news prints can produce a worse price.

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A stop loss is a pre-commitment, not a safety net

A stop loss is the price at which you have agreed, in advance, that your idea was wrong. That is what it is for. It is not primarily a device for limiting damage after the fact, it is the thing that makes the trade measurable in the first place. Without a stop distance there is no way to compute a position size, which means there is no way to know what the trade can cost you. An open position with no defined invalidation point is not a trade, it is an exposure.

This is why the stop has to be decided before entry, from the chart, and why it has to be a real order sitting at the broker rather than an intention you are holding in your head.

Where the stop belongs

Structure-based. Put it beyond the level that invalidates the setup. If you are long from a support zone, the stop belongs below that zone, at the price where the reason you took the trade no longer exists. This is the default, because it is the only placement tied to the actual idea.
Volatility-based. Use a multiple of average true range, commonly 1 to 2 times the current ATR for your timeframe, so the stop sits outside normal noise rather than inside it. Useful when structure is vague or when volatility has shifted sharply.
Time-based. Some strategies close a position after a fixed number of bars if the move has not started. This is a supplement to a price stop, never a replacement for one.
The worst practice. Choosing the stop so that a larger position fits your risk budget. That inverts the entire logic: the chart tells you where the stop goes, and the stop tells you how big the position can be.

A stop inside the noise, and a stop outside it

You want to buy EUR/USD at 1.0850. The swing low that defines the setup is 1.0822, and recent daily ATR is about 60 pips. Placing the stop at 1.0845, five pips below entry, feels efficient because it allows a very large position. It is also inside the noise: a 60-pip-ATR market will breathe through five pips in minutes, so you will be stopped out of correct ideas repeatedly and pay the spread each time.

Placing it at 1.0815, just under the swing low with a small buffer, gives a 35-pip stop. On a 5,000 USD account risking 1%, that is 50 / (35 x 10) = roughly 0.14 lots. Smaller position, but now a random 20-pip wobble does not end the trade, and the loss only happens if the structure genuinely breaks. Run the numbers for your own pair with the position size calculator.

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The mistakes that cost the most

Moving the stop away as price approaches it. This is the single most expensive habit in retail trading. It converts a small planned loss into a large unplanned one, and it works often enough to be reinforced, right up until the trade that does not come back.
Stops inside the noise. Too tight for the timeframe means random movement takes you out of good ideas. If you are being stopped and then watching price go your way without you, the stop is too close, not the market too cruel.
Mental stops. In a fast market, hesitation costs real money, and the moment you most need to exit is the moment you are most invested in being right. Use hard stops placed with the entry.
The same stop on every pair. A 20-pip stop is loose on EUR/USD in a quiet session and tight on GBP/JPY during the London open. Stop distance should follow the instrument's actual movement, not a habit.

Trailing, break-even, and what they cost

Moving the stop to entry after a first target, or trailing it behind structure as the move develops, protects open profit. It also has a price: you will sometimes be taken out at break-even on trades that then run without you. That trade-off is a strategy choice, not a universally correct move. Make it deliberately, apply it consistently, and then judge it over a sample of trades rather than on the one that got away.

One honest limitation. A stop is an instruction to exit at the market once a price trades, not a promise of that exact fill. Over a weekend gap, or in the seconds around a central bank decision, the fill can be materially worse than the level you set, and the realised loss larger than planned. Slippage is a normal feature of leveraged markets, and it is one more reason to sit at the conservative end of your sizing range rather than the aggressive one.

Break-even stops deserve a specific warning. Moving to entry too early, before the trade has cleared the noise band around your entry, converts a good position into a coin flip on the next retrace. If your instrument has a 60-pip daily range and you move the stop to entry after 8 pips of profit, you have effectively re-entered with an 8-pip stop. Wait until price has travelled at least as far as the original stop distance, or until a structural level has formed behind the trade, before touching anything.

The practical routine is short. Mark the invalidation level before you enter. Place the stop there with the entry order, in the same action. Then leave it alone. Every decision you make about that stop after the trade is live is a decision made with money on the line, which is exactly the condition under which people decide badly.

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Written and reviewed by the MarketPro research desk

MarketPro is a trading-signal and trading-education app operated by Harajuku Holdings LTD (Cyprus). Our signal desk publishes and tracks every trade idea in-app, and every page here is checked against the app's live behaviour before publishing. Last reviewed 15 September 2026. How we produce signals and content · About MarketPro

FAQ

Stop Losses: questions

Where should I place my stop loss?

Place it beyond the level that invalidates your reason for the trade, typically just outside the swing high or low that defines the setup. If structure is unclear, a distance of one to two times the current ATR keeps the stop outside normal noise. The correct placement is the one the chart justifies, then you size the position to fit it.

Should I use a mental stop instead of a hard stop?

Hard stops are safer for almost everyone. A mental stop requires you to act decisively at the exact moment you are most emotionally committed to being right, and in a fast market hesitation of a few seconds costs real money. Placing the order with the entry removes that decision from the moment it is hardest to make.

Why do I keep getting stopped out just before price goes my way?

Usually the stop is too tight for the volatility of the instrument and timeframe you are trading. If daily ATR is 60 pips, a 10-pip stop will be hit by ordinary noise regardless of whether the idea is correct. Widen the stop to sit beyond the noise and reduce the position size to keep the cash risk unchanged.

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