GLOSSARY
Stop loss
The level where you decide, in advance, that the trade idea was wrong.
By FirstPip editorial team · Updated 2026-09-06 · Educational content · No broker owns this site
Quick answer. A stop loss is an order that closes a trade once price reaches a level you chose in advance. It caps the planned loss on that trade, but it is not a guaranteed exit price in fast markets, such as around major news releases.
A stop loss is a resting order that closes your position when price reaches a level you picked before entering. Its job is not to make the trade safe — it is to make the size of the damage a decision instead of an accident.
Because the stop distance and your position size together fix the cash at risk, the stop is also what makes lot size a calculation rather than a guess.
How much does a stop loss cost?
Buy EUR/USD at 1.1000 with one mini lot, stop at 1.0980:
| Step | Working | Result |
|---|---|---|
| Distance to stop | 1.1000 − 1.0980 | 20 pips |
| Value of one pip | 0.0001 × 10,000 units | $1.00 |
| Planned loss | 20 × $1.00 | $20 |
The number is known before you click. That is the whole benefit — not that $20 is small, but that it was chosen.
Does a stop loss guarantee your exit price?
No. Around big scheduled news releases, spreads widen and orders can fill far from where you expect, so a stop loss is not a guaranteed exit price in those moments. The gap between the price you expected and the price you got is called slippage. Retail forex is traded off-exchange (OTC), against your dealer rather than on a central exchange — a point the US CFTC makes in its customer advisory on forex — so you are limited to the prices the dealer offers. A stop limits the damage; it does not promise a precise exit.
That is why my stop was only $20 is a planned figure, not a promise.
What do beginners get wrong about stop losses?
| Mistake | Why it hurts |
|---|---|
| Placing the stop where the loss feels comfortable | The market does not know your comfort level; a stop that tight gets hit by ordinary noise |
| Widening the stop after entry | Turns the loss you accepted into one you never agreed to |
| Moving the stop to break even too early | A normal pullback closes a trade that was working |
| Trading without one because "I'll watch it" | Leaves the loss open-ended the moment attention breaks |
The order of operations that avoids most of this: decide where the idea is wrong (often just beyond a support or resistance zone), put the stop there, then size the position so that distance costs what you planned to risk.
Related terms
- Take profit — the same idea on the winning side
- Pip · Lot · Mini lot
- Lesson: risk per trade · Pre-trade checklist
Frequently asked questions
Is a stop loss guaranteed?
No. In fast markets, such as around major scheduled news releases, orders can fill far from where you expect, so a stop can close you out at a worse price than your level — that difference is slippage. Off-exchange retail forex is also traded against your dealer rather than on a central exchange, so you are limited to the prices the dealer offers.
Can I trade forex without a stop loss?
You can, but the loss is then open-ended unless you have another strict exit rule and you are at the screen to apply it. For a beginner that is how a single trade turns into an account-sized loss.
Should I move my stop loss to break even?
Moving the stop to your entry price removes most of the original risk, but doing it too early closes trades during normal pullbacks. It also is not truly free: spread, commission and slippage mean the exit may not land exactly at zero.
Is a stop loss a good idea?
For most beginners, yes. A stop loss turns an open-ended loss into a planned one: you decide the worst case before you enter, and the trade closes there without you watching. It does not make a trade profitable, but trading without one lets a single bad move damage the whole account.
Is there a 7% or 20% rule for stop losses in forex?
Not in forex. The 7–8% stop rule comes from stock investing, and risking 20% on one trade is far too much. In forex the stop goes where the trade idea is proven wrong, and you size the position so that distance costs only a small share of the account — commonly 1–2%.
What is the golden rule of a stop loss?
Set it before you enter, and never widen it. Put the stop where your trade idea would be wrong, then size the position so that distance costs only what you planned to risk. Moving a stop further away to avoid being closed turns a loss you accepted into one you never agreed to.
Keep going
Sources
- U.S. CFTC — Customer Advisory: Eight Things You Should Know Before Trading Forex (off-exchange OTC forex is traded against the dealer, not a central exchange)
- FirstPip knowledge base — risk/breakeven-stop-and-trailing-stop, risk/risk-per-trade, concepts/order-types, market/news-and-price-reaction