Indicators · Intermediate

Average True Range For Measuring Volatility

ATR is a distance, not a direction. Its job is to tell you how wide a stop has to be to sit outside ordinary movement.

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

In short

Average True Range measures how far a market typically travels per period, averaged over 14 periods, using a true range that accounts for gaps as well as the high-to-low distance. It is directionless: a sharp rally and a sharp sell-off produce the same reading. Its main use is sizing stops to current conditions, since a stop set as a multiple of ATR widens automatically when volatility expands and tightens when it contracts.

What to remember

True range counts gaps. A 15-pip bar that opened 50 pips below the previous close has a true range near 50, not 15.
An ATR-based stop keeps currency risk constant while lot size varies. A 70-pip ATR and a 130-pip ATR buy very different position sizes for the same 1 per cent.
A fixed pip stop is a tight rule in volatile conditions and a loose one in calm conditions, applied without noticing the difference.
ATR lags a shock by construction, because one enormous true range is diluted by the thirteen ordinary ones averaged with it.

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Average True Range answers one question with one number: how far does this market typically travel in a period? It has no direction and no opinion. A market collapsing 90 pips an hour and a market rallying 90 pips an hour produce the same ATR, which is precisely what makes it useful for sizing a stop.

True range counts the gap, not just the bar

True range for a single period is the largest of three distances: the current high minus the current low, the current high minus the previous close, and the previous close minus the current low. The second and third exist to catch gaps. If Monday closes at 1.0900 and Tuesday opens at 1.0850 and trades a narrow 15-pip range, the high-low measure reports 15 pips and understates the move badly. The gap-aware measure reports the distance from the previous close, which is closer to 50.

ATR is then an average of those true ranges, conventionally over 14 periods. What you read off the chart is a typical distance, in the price units of the instrument, for the timeframe you are looking at.

A 70-pip ATR turned into lots

Take EUR/USD on a daily chart with ATR(14) reading 0.0070, which is 70 pips. You want a stop that sits outside ordinary daily movement, so you use a multiple, and 1.5 times ATR is a common choice. That is 105 pips.

Now the account arithmetic. On a 2,000 account risking 1 per cent per trade, the maximum loss is 20. A micro lot on EUR/USD is worth roughly 0.10 per pip, so 105 pips of stop costs 10.50 per micro lot. Twenty divided by 10.50 is 1.9, and a fractional lot is not a thing you can trade, so the position is one micro lot. Round down, never up: two micro lots would put 21 at risk against a 20 limit, and a rule you exceed by a fifth on the first trade is not a rule.

Then let the market change and watch the position change with it. Three weeks later volatility has expanded and ATR reads 0.0130, or 130 pips. The same 1.5 multiple now gives a 195-pip stop, costing 19.50 per micro lot, so the same 1 per cent of the same account buys a single micro lot. The risk in currency has not moved. The size fell because the stop had to widen, which is exactly the behaviour you want and the opposite of what happens with a fixed lot size. The position size calculator runs this for your own numbers, and the pip calculator settles the per-pip value on pairs where it is not 0.10.

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Why a fixed 20-pip stop is a moving target

A stop measured in pips is only meaningful relative to how much the market moves. Twenty pips on EUR/USD in a quiet August session is a wide stop. Twenty pips on the same pair during a central bank press conference is inside the spread of a single candle.

The trader who uses 20 pips all year is not applying one rule. They are applying a very tight rule in volatile conditions and a loose one in calm conditions, without realising which is which. ATR converts the pip figure into a proportion of normal movement, so the same rule means the same thing in every regime.

ATR says nothing about direction

A rising ATR is not bullish or bearish. It means the market is moving further per period, which happens on the way up and on the way down.
A low ATR is not safety. Quiet conditions precede violent ones often enough that a compressed reading is as much a warning as a comfort.
It is not a target generator on its own. Asking for three times ATR on a market that has not travelled that far in a week is a target with no basis.
It is an average, so it is backwards looking. A shock arrives in full on the first bar and only reaches ATR gradually, spread across the next 14.

The buffer ATR does not build in for you

That last point is the one that costs money. ATR responds to a volatility shock slowly by construction, because a single enormous true range is diluted by the 13 ordinary ones it is averaged with. A 14-period ATR that reads 70 pips can be sitting under a market that just travelled 200 pips in an hour.

Two practical defences. First, widen the multiple around scheduled events rather than trusting the reading through them, since a calendar release is a known volatility change that the average has not seen yet. The session guide covers when those overlaps and releases land. Second, treat the ATR stop as a minimum distance rather than a precise one, and let structure override it: if the level that invalidates your idea sits 130 pips away and ATR suggests 105, the stop goes at 130 and the size comes down. A stop placed where the idea is still valid is a stop that will be hit for no reason, which is the argument the risk management guide makes at length.

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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

Average True Range For Measuring Volatility: questions

What ATR multiplier should I use for a stop loss?

Multiples between 1.5 and 3 times ATR are the common range, with wider multiples suiting longer holding periods and slower timeframes. The multiple matters less than applying it consistently and letting position size absorb the difference. A stop should also respect structure, so if the level that invalidates the idea sits beyond the ATR distance, the stop goes there and the size comes down.

Does ATR tell you if a market is going up or down?

No. ATR measures the size of movement and discards its direction entirely, so a market falling hard and a market rising hard produce identical readings. Any interpretation of ATR as bullish or bearish is a misreading. Direction has to come from price structure or from a directional indicator used alongside it.

Why does ATR react slowly to a volatility spike?

Because it is an average of the last 14 true ranges, so a single very large period is diluted by the thirteen normal ones it is averaged against. A market that has just travelled 200 pips in an hour can still show an ATR of 70. Adding a buffer around scheduled news events compensates for the delay.

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