Quick answer: ATR (Average True Range) tells you how much an instrument moves per candle on average. A sensible stop usually sits between 1 and 2 ATR from your entry. Put it at 0.3 ATR and you didn't get the direction wrong — you got the distance wrong. And when ATR rises, the stop widens and the lot size drops, never the other way around.
Key takeaways
- ATR measures volatility, not direction.
- A stop inside the normal noise means exits for nothing.
- Typical multiplier: 1 to 1.5 ATR intraday, 2 ATR or more for swing.
- Risk in money stays fixed; volume is what changes.
- The same ATR number does not mean the same risk on two instruments.
What does ATR actually measure?
ATR averages the “true range” of the last N candles, including gaps between close and open. ATR(14) on a 15-minute chart gives you the typical move of the last fourteen 15-minute blocks. It predicts nothing: it describes the current size of the noise.
From ATR to stop: the practical table
| Style | Timeframe | Usual multiplier |
|---|---|---|
| Scalping | 1 to 5 minutes | 1 to 1.2 ATR |
| Intraday | 15 minutes to 1 hour | 1.2 to 1.5 ATR |
| Swing | 4 hours to daily | 2 to 3 ATR |
These are not sacred numbers. They are starting points you should measure against your own history.
How does my lot size change when volatility rises?
This is the part most traders skip. If risk in money is fixed and the stop widens, volume has to come down. Example on a $10,000 account at 1% ($100) with a point value of $1 per minimum lot:
| ATR | Stop at 1.5 ATR | Risk | Lots |
|---|---|---|---|
| 40 points | 60 points | $100 | 1.66 |
| 60 points | 90 points | $100 | 1.11 |
| 100 points | 150 points | $100 | 0.66 |
| 200 points | 300 points | $100 | 0.33 |
The maximum loss is always $100. The only thing that moves is position size. That is the difference between surviving a volatile day and blowing up in it.
Where to put the stop in practice
- Find the level that invalidates your idea (range low, failed breakout, and so on).
- Read the current ATR on the timeframe you trade.
- Place the stop at least 1 ATR beyond that level, not right on top of it.
- Size the lot from the resulting distance, not the other way around.
- If the lot comes out below the tradable minimum, skip the trade.
That last point is the most important and the most ignored: sometimes the right answer is not to trade that instrument that day.
Common mistakes
- Using one fixed point stop for every instrument and every session.
- Widening the stop after the trade is already open and losing.
- Reading ATR on one timeframe and trading a very different one.
- Forgetting that ATR spikes around high-impact news.
- Offsetting a wider stop with a bigger lot “to make the same amount”.
Automating the distance
Working out ATR and volume on every entry is tiring, and tiredness produces mistakes. In Cortex Automation you set risk per trade and the distance adapts to current volatility; the Cortex Signal Kit plots levels already referenced to the recent range. To see how it behaves before deciding, the Automation Test runs five days. To track whether your stops are too tight, the ebook The Trading Journal Blueprint includes the exact field to record.
Frequently asked questions
Which ATR period should I use?
14 is the standard and works well. Shorter periods react faster but swing a lot; longer ones are stable but slow.
Can ATR set the take profit too?
Yes. If your stop is 1.5 ATR away, a 3 ATR target is roughly 2R.
Can I use ATR on any instrument?
Yes, but always compare ATR to price: 50 points means different things on gold and on an index.
Is 1 ATR too little or too much?
It depends on your style. What never works is a stop inside the instrument's usual noise.
What should I do on news days?
Either cut the lot because ATR is higher, or stay out. What you should not do is trade your usual size.
Let volatility set the distance. See Cortex Automation and the Cortex Signal Kit.
Disclaimer: educational content. The multipliers are references and should be validated with your own data. Cortex Next is not a financial service and guarantees no results. Trading involves risk of loss.
