📏 Average True Range ATR
A chart indicator that measures how much a price typically moves over a stretch of time, usually the last 14 candles. It tells you the size of the swings, not which way they're headed.
🚗 The simple version — how bumpy was the ride?
Picture a car. ATR doesn't tell you where the car is going. It tells you how bumpy the last part of the trip has been — a smooth highway or a pothole-filled back road. A small ATR means calm markets with little movement. A large ATR means dramatic, fast swings. The number rises when news shakes the market and falls when things go quiet.
🧮 What "true range" actually measures
For each candle, ATR first works out the true range: the biggest of these three distances.
| Distance | What it captures |
|---|---|
| 📐 High − Low | How far price ranged inside this candle |
| ⬆️ High − previous close | An upward gap from where the last candle ended |
| ⬇️ Low − previous close | A downward gap from where the last candle ended |
Why bother with the previous close? Because price often jumps between candles. Crypto trades around the clock, but gaps still happen on bursts of news. Using only high-minus-low would miss that jump; the previous-close comparison makes sure a gap still counts as real movement.
📉 Turning true range into ATR
ATR is just a smoothed average of those true-range values, usually over the last 14 candles. Smoothing keeps one wild candle from making the line spike and snap back. The standard recipe, from the indicator's creator, blends most of yesterday's ATR with today's fresh true range.
📊 The "14" is only a default — you can set it shorter to react faster, or longer to stay smooth. ATR also works on any timeframe: a 5-minute chart, a daily chart, or a weekly one.
🛡️ Why crypto traders watch it
Crypto moves fast, so ATR is mostly a risk tool, not a buy or sell signal. Common beginner uses.
- 🎯 Stop-loss distance — Place a stop a multiple of ATR away (often 1× to 2×) so it sits outside normal noise instead of a fixed, arbitrary gap
- ⚖️ Position sizing — Take a smaller position when ATR is high (wild) and a larger one when it's low (calm)
- 🪤 Trailing stops — An ATR-based trailing stop adapts to volatility, which helps avoid getting shaken out by ordinary wiggles
You'll first meet ATR as a selectable indicator on charting tools like TradingView or inside an exchange's charts. It was created by J. Welles Wilder Jr. in his 1978 book on trading systems, originally for commodities.
🚨 What ATR can't do
- 🧭 No direction — It never tells you up or down; combine it with a trend or momentum tool
- 🌀 Choppy ranges fool it — In sideways, indecisive markets it can give misleading readings
- 🔢 It's relative — An ATR of 500 means a lot on a cheap coin and little on an expensive one, so read it against the asset's own price
❓ FAQ
- Does a high ATR mean the price is going up?
- No. ATR only measures how big the moves are, not which way they go. A high reading fits a sharp crash just as well as a sharp rally. To judge direction, pair ATR with a trend tool.
- What does the number 14 mean on an ATR indicator?
- It's the lookback period — how many recent candles ATR averages. 14 is the default Wilder used, but you can change it. Fewer periods react faster and look jumpier; more periods are smoother and slower.
- Why not just use the high minus the low for each candle?
- Because price often gaps between candles. The 'true range' also compares to the previous close, so an overnight jump still counts as volatility. A plain high-minus-low would miss those gaps.