Average True Range (ATR)

The Average True Range (ATR) is one of the most widely used volatility indicators in technical analysis. Developed by J. Welles Wilder, it measures the average size of price moves over a specified period by calculating the "true range" of each candle. The true range is defined as the greatest of three values: the distance between the current high and low, the distance between the current high and the previous close, or the distance between the current low and the previous close. By taking the absolute values and averaging them, ATR captures the full extent of price movement including gaps, giving a more accurate picture of volatility than a simple high-to-low range would provide.

ATR does not indicate the direction of price movement — it only measures how much an asset is moving. A rising ATR signals that volatility is expanding and the market is becoming more active, while a falling ATR indicates a quieter, more compressed market. Traders often watch for ATR breakouts: when a period of low ATR is followed by a sudden spike, it can signal the beginning of a significant trend. Conversely, extremely high ATR readings can warn of exhaustion and potential reversals.

For algorithmic and crypto traders, ATR is an indispensable tool for risk management and trade sizing. Because crypto assets can experience ATR values several times larger than traditional markets, bots use ATR to dynamically set stop-loss and take-profit levels that breathe with the market rather than using fixed pip distances. A common approach is the "ATR multiplier" method, where stops are placed at 1.5x or 2x ATR from the entry price. This ensures that normal market noise doesn't trigger an exit while still providing meaningful protection against adverse moves.