ATR and Volatility

ATR tells you how far, never which way

Average True Range measures how much an instrument typically moves in one candle, averaged over a lookback window, normally 14. It is quoted in price units, so a daily ATR of 0.0080 on EUR/USD means the pair covers roughly 80 pips in a typical day. That is the whole output. ATR has no directional opinion whatsoever, and that is precisely why it is useful: it answers a question direction cannot.

The word "true" in true range does the important work. Range alone is high minus low. True range also considers the gap from the previous close, taking the largest of three measures: high minus low, high minus previous close, and previous close minus low. That way a market that gaps 40 pips and then trades a 20 pip range is recorded as having moved 60, not 20.

Why size matters more than direction for your account

Two pairs can trend identically on a chart while one covers three times as much ground per day. If you use the same 20 pip stop and the same lot size on both, your risk is wildly inconsistent, and you will not notice because the charts look the same when the axes are scaled to fit.

Put numbers on it. A 20 pip stop on a pair with a 40 pip daily ATR sits at half a day's normal movement. The same 20 pip stop on a pair with a 130 pip ATR sits at roughly 15% of a normal day, which means routine intraday noise will remove you from the trade before the idea has had a chance to be right or wrong. Volatility awareness is what makes risk management portable between instruments, which matters the moment you trade more than one thing.

Four practical uses

• Stop placement. A stop at a multiple of ATR, commonly 1.5x or 2x, sits outside ordinary noise. A 10 pip stop on an instrument that covers 100 pips a day is a coin flip with extra commission attached.
• Target realism. If a target needs three days of average range to reach and you intend to close the trade today, the trade was never going to work. Expressing targets in ATR multiples makes that visible before you enter rather than after.
• Position sizing. Wider ATR means a wider stop means a smaller position for the same money at risk. This is the mechanism that keeps a gold trade and a EUR/USD trade genuinely equal in risk terms.
• Regime detection. Expanding ATR marks rising activity, often around scheduled events. Contracting ATR marks quiet consolidation, which frequently precedes expansion.