📊 Technical Indicators

ATR (average amplitude) indicator complete explanation | Stop Loss Settings and Volatility Analysis 2026

We provide a complete explanation of the principles of the ATR (Average True Range) indicator, how to set stop-loss distances, measure market volatility, and how to link it to position size in futures trading.

📅 2025-12-29
#ATR indicator#average amplitude#average true range#stop loss setting method#futures trading volatility
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What is ATR (Average True Range)?

ATR (Average True Range)
ATRLow Volatility= Low ATRHigh Volatility= High ATR

ATR (Average True Range) is an indicator that measures market volatility. It shows numerically, “How much does this coin move on average per day?”

Developed in 1978 by J. Welles Wilder, the father of technical stock analysis, it is essential for futures traders today to set stop loss distances and determine position sizes.


ATR calculation principle

ATR is a moving average of True Range.

True Range = Largest of: 
1. High price of the day - Low price of the day 
2. Closing price of the previous day - High price of the day (absolute value) 
3. Closing price of the previous day - Low price of the day (absolute value)

ATR (period 14) = Exponential Moving Average with 14-period True Range 

It is built into all exchange charts without the need for manual calculations.


How to read ATR

Meaning of ATR values

BTC ATR (4-hour chart) = $1,500

What it means: It moved about $1,500 on average over the last 14 4-hour candles. 
→ If you set the stop loss at $500, it can explode even with normal fluctuations. 
→ A minimum stop of $1,500 to $2,000 is required. 

What ATR changes mean

ATR changesmarket situationStrategy
ATR increaseIncreased volatility (big move expected)Reduce position size
ATR reductionReduced volatility (sideways, waiting for explosion)Combination with Bollinger Squeeze
ATR surgeNews/Event OccurrenceEnter the trend direction or wait and see
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3 ways to use ATR in practice

Use 1: Set stop loss based on ATR (most important)

ATR based stop loss is much more reasonable than arbitrarily setting a 1% or 2% stop loss.

ATR based stop loss formula: 
Stop loss distance = ATR × 1.5 to 2 times

Example (BTC 4-hour bar): 
ATR = $2,000 
Stop loss = $2,000 × 1.5 = $3,000 (based on entry price)

Reason: Designed to avoid stop loss within normal volatility of $2,000 

Use 2: Determine position size

Formula: 
Position size = (Account × Risk Ratio) / ATR

Example: 
Account: $10,000 
Risk: 1% = $100 
ATR: $2,000

Position size = $100 / $2,000 = 0.05 BTC

Meaning: When a stop loss occurs, you only lose exactly 1% of your account. 

This way you can trade any stock with the same risk.

Use 3: ATR + Bollinger Band combination

When ATR is low (sideways): 
If the Bollinger Bands are contracting at the same time = a big price movement is imminent.

Waiting Strategy: 
- When ATR starts to increase + enters the direction of Bollinger breakout 
- The direction of the first bar where volatility explodes determines the short-term trend. 

ATR settings

SettingsBasicScalpingswing
period147~1020~30
base rod4 hour bar5~15 minutesdaily salary

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