Atr Complete Guide
Average True Range
What is Atr?
The Average True Range (ATR) is a technical analysis indicator, introduced by J. Welles Wilder Jr. in his 1978 book, 'New Concepts in Technical Trading Systems.' It is designed to measure market volatility by decomposing the entire range of an asset price for a specific period. Unlike many other indicators, ATR does not provide a trend direction; instead, it focuses solely on the degree of price movement. The calculation is based on the 'True Range,' which is the greatest of three values: the current high minus the current low, the absolute value of the current high minus the previous close, and the absolute value of the current low minus the previous close. This methodology ensures that price gaps are accounted for in the volatility measurement. The default parameter for ATR is 14 periods, though shorter periods (e.g., 5 or 10) can be used for increased sensitivity, while longer periods (e.g., 20 or 50) provide a smoother, long-term view of volatility. In practice, a rising ATR indicates increasing selling or buying pressure and higher volatility, while a falling ATR suggests a period of consolidation or stable price action. Traders commonly use ATR to set dynamic stop-loss levels—often placing stops at a multiple of the ATR (e.g., 2x ATR) from the entry price—to avoid being stopped out by 'market noise.' It is also an essential tool for position sizing, where traders reduce position sizes during high ATR periods to manage risk effectively.
Signal Types
Volatility Breakout
A sharp increase in ATR from a multi-period low often signals the start of a strong new trend or a significant price breakout.
Trend Exhaustion
Extremely high ATR values relative to historical norms may indicate a buying or selling climax, suggesting the current trend is overextended and due for a reversal or pause.
Trailing Stop Adjustment
When ATR increases, traders widen their stop-losses to accommodate higher volatility; when ATR decreases, stops are tightened to protect profits.
Related Indicators
FAQ
Does a rising ATR mean the price is going up?
No. ATR is non-directional. It only measures the intensity of price movement. A rising ATR can occur during both sharp rallies and steep sell-offs.
How is ATR used for position sizing?
Traders use ATR to equalize risk. In high ATR (volatile) environments, position sizes are reduced. In low ATR (quiet) environments, position sizes can be increased while maintaining the same total dollar risk.
What is the 'Chandelier Exit' in relation to ATR?
The Chandelier Exit is a popular trailing stop-loss method that sets the exit point at a specific multiple of ATR (usually 3x) away from the highest high of the current trend.
Parts of this page (FAQ, introductions) are AI-assisted. Core data and statistics are algorithmically computed. All pattern definitions are human-reviewed.
Aviso: Esta página é baseada em dados de mercado públicos e análise técnica algorítmica. Não constitui aconselhamento de investimento.
Data source: EODHD · © 2026 KlineVision AI