Forex course · Section 5: Risk, Strategy and Testing
Stop-Loss Placement with ATR and Risk:Reward in Forex
Place forex stop-losses where your idea is wrong, use ATR to keep them outside normal noise, and use risk:reward and expectancy to judge a trade.
Advanced5 min read·6:37 video·Lesson 19 of 26·quiz: 4 questions
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A good stop-loss sits where your trade idea is clearly wrong and outside the pair's normal random movement; a common way to measure that noise is the ATR (Average True Range), placing stops 1.5 to 3 times the ATR away. Risk:reward compares what you risk with what you aim to gain, and tells you the win rate you need: at 1:2, you break even by winning one trade in three, before costs. The stop decides where you are wrong; position sizing then decides how much that costs.
Stop first, size second
Beginners often pick a lot size and then put the stop wherever the loss "feels" acceptable. That puts the stop in a random place. The right order is:
- Choose the stop level from the chart and volatility.
- Measure the distance in pips, including the spread.
- Calculate the lot size from your risk per trade (Position Sizing).
A wide stop is fine. It just means a smaller position.
Three ways to place a stop
1. Structure-based: beyond the swing low (for a long) or swing high (for a short), or beyond a support or resistance zone (see Support, Resistance and Trend). If price gets there, the pattern you traded has failed.
2. Volatility-based (ATR): a fixed multiple of ATR from entry. It ignores chart opinions and adapts automatically: quiet pairs get tight stops, wild ones get wide stops.
3. Combined: beyond the nearest structure, but never closer than about 1 × ATR. Many traders find this the most sensible.
Avoid round-number stops placed exactly at 1.1000 or 150.00, where many other stops sit. Put yours a buffer beyond.
ATR stops with numbers
Example
5,000-dollar account, 1% risk = 50 dollars. Daily ATR(14): EUR/USD 65 pips, GBP/JPY 140 pips (illustrative values). Stop = 2 × ATR + spread.
| EUR/USD | GBP/JPY | |
|---|---|---|
| Stop distance | 2 × 65 + 1 = 131 pips | 2 × 140 + 3 = 283 pips |
| Pip value per lot | 10.00 dollars | 6.67 dollars (USD/JPY at 150) |
| Lot size | 50 ÷ (131 × 10) = 0.038 → 0.03 | 50 ÷ (283 × 6.67) = 0.026 → 0.02 |
| Real risk | 39.30 dollars | 37.75 dollars |
The volatile pair gets a stop more than twice as wide, and a smaller position, so both trades risk about the same money. That is called volatility-normalised sizing.
Typical multiples: 1 to 1.5 × ATR for short-term trades, 2 to 3 × ATR for swing and trend trades on daily charts. Wider stops are hit less often but each trade needs a bigger move to reach a given multiple of risk. The right multiple is something you test, not guess.
Risk:reward
Reward:risk (often called risk:reward) is the distance to your target divided by the distance to your stop.
Example
Buy EUR/USD at 1.1000, stop at 1.0960 (40 pips), target at 1.1080 (80 pips). Reward:risk = 80 ÷ 40 = 2, written 1:2. You risk 1R to make 2R.
The break-even win rate is the share of trades you must win so that wins pay for losses:
Break-even win rate = 1 ÷ (1 + reward:risk)
| Reward:risk | Break-even win rate |
|---|---|
| 1:1 | 50.0% |
| 1:1.5 | 40.0% |
| 1:2 | 33.3% |
| 1:3 | 25.0% |
Costs change the ratio
Example
A scalp with a 20-pip stop and a 40-pip target looks like 1:2. With a 1.5-pip spread, a loss is really 21.5 pips and a win 38.5 pips. Real reward:risk = 38.5 ÷ 21.5 = 1.79, and the break-even win rate rises from 33.3% to 35.8%. Add a commission and a little slippage, and it rises further. The shorter the trade, the more costs matter.
Expectancy: the number that matters
A high reward:risk is not automatically good. A target far away is reached less often, so the win rate falls. The two must be judged together through expectancy, the average result per trade in R:
Expectancy = (win rate × average win) − (loss rate × average loss)
Example
Strategy A wins 40% of the time, average win +2R, average loss −1R: 0.40 × 2 − 0.60 × 1 = +0.20R per trade. Strategy B wins 65% of the time, average win +0.6R, average loss −1R: 0.65 × 0.6 − 0.35 × 1 = +0.04R. Strategy B wins more often but earns far less per trade, and its edge could vanish with slightly higher costs.
At 1% risk per trade, +0.20R over 100 trades is roughly +20R, around +20% before compounding. But expectancy measured on a few dozen trades is very uncertain. You need a large sample, ideally from a proper backtest and then live results, to know whether it is real (see How to Backtest a Forex Strategy).
Managing the stop after entry
- Never move a stop further away. It turns a planned 1R loss into an unplanned 2R or 3R loss.
- Moving to break-even feels safe but often cuts trades that would have recovered, and can reduce expectancy. Test it rather than doing it by instinct.
- Trailing stops (for example 2 or 3 × ATR behind the best price) let winners run in trends; they suit trend-following systems.
- Time stops: if a trade has gone nowhere after a set number of days, close it. Money tied up in dead trades also pays swaps.
Risk
A stop-loss limits losses in normal markets only. Weekend gaps and news can fill it far beyond its level (see Forex Order Types). Size every trade so that a gap of two or three times your stop would hurt but not ruin the account.
Tip
Record the planned stop, target, R:R and actual result in R for every trade in your journal. After 50 trades you will know your real win rate and average win, which is worth more than any rule of thumb.
Next: the uncomfortable truth about retail forex results in Why Most Forex Traders Lose Money.
Key takeaways
- Put the stop where the trade idea is proven wrong, beyond normal noise; then size the position to fit it.
- ATR-based stops (for example 1.5 to 3 × ATR) adapt to each pair's volatility, so a volatile pair gets a wider stop and a smaller position.
- Break-even win rate = 1 ÷ (1 + reward:risk). At 1:2 you need to win just over a third of trades, before costs.
- Expectancy combines win rate and payoff: it is the average R you make per trade, and it must be positive after costs.
Quiz: check what you learned
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