Average True Range

The Average True Range, developed by J. Welles Wilder in 1978, is different from most indicators because it says nothing about price direction. Instead, it measures how much an asset moves — its volatility — expressed in absolute price terms. This makes ATR one of the most practical tools for risk management and position sizing.

True Range is the greatest of three values: the current high minus the current low, the absolute value of the current high minus the previous close, or the absolute value of the current low minus the previous close. This three-part calculation captures gaps between sessions that a simple high-low range would miss. ATR is then the moving average of True Range over the specified period (usually 14 bars).

The most direct application is stop-loss placement. Instead of using fixed pip values that ignore market conditions, traders multiply the current ATR by a factor (typically 1.5 to 3) and set their stop that distance from the entry. In a low-volatility market, this produces tight stops. In a high-volatility market, it automatically widens the stop to avoid being shaken out by normal price noise. This single adjustment can dramatically improve a strategy's performance.

Position sizing is the other core use. If you risk a fixed dollar amount per trade, the stop distance (derived from ATR) determines your lot size. Wider ATR-based stops mean smaller positions; tighter stops allow larger ones. This normalizes risk across instruments and market conditions, so your EUR/USD trade carries the same dollar risk as your gold trade despite vastly different volatility profiles.

ATR also serves as a volatility filter for strategy selection. High ATR readings (relative to the instrument's historical average) indicate breakout-friendly conditions where momentum strategies thrive. Low ATR readings point to range-bound markets where mean-reversion strategies perform better. Some traders divide the current ATR by the 200-period ATR to get a normalized volatility ratio that works across different instruments.

On MetaTrader, ATR is a built-in indicator that displays as a single line in a separate window below the chart. Many custom indicators — including SuperTrend, Keltner Channels, and various trailing stop tools — use ATR as their foundation. Understanding ATR gives you insight into how these derived indicators work under the hood.

The ATR channel breakout strategy uses 2x ATR added to the previous bar's close as a buy trigger and 2x ATR subtracted as a sell trigger. When price exceeds these dynamic levels, it signals an above-normal move that's likely to continue. This captures momentum while automatically adjusting for the current volatility environment.

For position sizing, divide your risk amount by the ATR-based stop distance to calculate lot size. If you risk $100 per trade and ATR is 50 pips, your stop goes at 1.5x ATR (75 pips), making your lot size $100/75 pips = $1.33/pip. This normalization ensures consistent risk regardless of whether you're trading EUR/USD (typical ATR 60 pips) or GBP/JPY (typical ATR 150 pips).

The ATR trailing stop is a disciplined exit method. After entering a trade, set your stop at 2x ATR from the highest close (for longs). As price advances and the highest close moves up, the stop ratchets higher. It never moves backward. This lets profits run while providing a volatility-adapted exit that isn't too tight (getting stopped by noise) or too wide (giving back too much profit).