Average True Range (ATR)

ATR (Average True Range) is a technical indicator that measures how much a stock or asset moves on average during a set period, usually 14 days. It helps traders understand market volatility.

What is the ATR Indicator?

The ATR (Average True Range) is a technical indicator used to measure market volatility. It is typically calculated over 14 periods, which can be intraday, daily, weekly, or monthly, depending on the time frame you’re analysing.

How to Calculate ATR?

Formula Of ATR

ATR is very useful for setting stop-loss levels or entry targets, as it signals changes in market volatility. The calculation typically uses 14 days as the period. The formula for ATR is:

Example Of ATR

Where “n” is the number of periods (typically 14), and the True Range is the greatest of the following three values:

Step 1: Calculate the True Range (TR) for each day:

True Range is the maximum of:

• Current High – Current Low
• Absolute value of (Current High – Previous Close)
• Absolute value of (Current Low – Previous Close)

For Day-2:

• Current High – Current Low = 110 – 106 = 4
• |Current High – Previous Close| = |110 – 107| = 3
• |Current Low – Previous Close| = |106 – 107| = 1
• TR = max(4, 3, 1) = 4

For Day-3:

• Current High – Current Low = 108 – 104 = 4
• |Current High – Previous Close| = |108 – 110| = 2
• |Current Low – Previous Close| = |104 – 110| = 6
• TR = max(4, 2, 6) = 6

Step 2: Calculate the initial ATR using the first 14 days (if available).

ATR (Average True Range) is the average of the True Ranges over a set period, usually 14 days.

Initial ATR = (Sum of first 14 TR values) / 14

Step 3: Calculate the ATR for the following days:

After you’ve calculated the initial ATR, use the formula below to compute ATR for the next days:

ATR = [(Previous ATR × (n – 1)) + Current TR] / n

Where:
n = number of periods (generally 14)

Example Calculation:
Let’s assume the total of the first 14 True Range values is 84, so:

Initial ATR = 84 / 14 = 6

Now, for Day 15, suppose the True Range (TR) is 7.

ATR = [(6 × 13) + 7] / 14
ATR = (78 + 7) / 14
ATR = 85 / 14
ATR = 6.07

This ATR value of 6.07 shows the average daily movement (volatility) of the asset over the past 14 days. The higher the ATR, the more volatile the market; the lower the ATR, the more stable it is.

How to Use the ATR Indicator?

First, check the ATR value to understand how volatile the stock is. A higher ATR means the stock is showing more price movement, it’s more volatile. A lower ATR tells you the stock is relatively stable with smaller moves.

For a Long Position:

Suppose you’re buying a stock at ₹100 and the ATR is 2. One common way to set a stop-loss is to go 2 × ATR below the entry price.
So, Stop-Loss = 100 – (2 × 2) = ₹96.
This gives the trade enough room to breathe while protecting you from bigger losses.

For a Short Position:

Let’s say you’re shorting a stock at ₹100, and again, the ATR is 2. 

You can place the stop-loss 2 × ATR above the entry price.
So, Stop-Loss = 100 + (2 × 2) = ₹104.
This way, you manage risk without getting stopped out by normal price fluctuations.

This method allows you to adjust your stop-loss based on the stock’s volatility instead of using a fixed number that might not suit every situation.

For example, in the IndusInd Bank chart, a bullish marubozu candle is forming, which usually signals strong buying interest. If we decide to take a long position at ₹829 based on this pattern, we can use the ATR to set a smart stop-loss. The ATR helps us understand the stock’s typical daily movement, so we don’t place the stop too close and get knocked out by normal price swings.

• Entry Point: Suppose you enter a long trade at the current price of Rs. 829.
• Stop-Loss: Use the ATR to set your stop-loss level. A standard method is to place the stop-loss at 2 x ATR below the entry price.

ATR = 14.49

Stop-Loss = Entry Price – (2 x ATR)
Stop-Loss = 829 – (2 x 14.49)
Stop-Loss = 829 – 28.98 = Rs. 800.02

Limitations Of Average True Range

Here are some downsides that Traders should keep in mind while using the ATR technical indicator

ATR has No Direction

ATR only tells you how much the price is moving, not whether it’s going up or down. So, a high ATR could happen in both strong uptrends and sharp downtrends; it doesn’t tell you which way to trade.

Indicator Gives Wide Stop-Losses

When markets are very volatile, ATR values go up. This can lead to very large stop-losses, which might not suit traders with smaller capital or tighter risk limits.

Conclusion

The Average True Range (ATR) is a helpful tool for understanding how much a stock or asset moves over time. It doesn’t predict direction, but it helps traders manage risk by setting better stop-loss levels based on market volatility. ATR adjusts with market conditions, making it more flexible than fixed-number strategies. However, it’s not perfect; it should be used along with other indicators, as it doesn’t show trends or future price moves. If used wisely, ATR can help traders stay in trades longer and avoid getting stopped out by normal price fluctuations. It’s a useful tool, but not a complete solution on its own.

Frequently Asked Questions (FAQs)

What is a good Average True Range?

A good ATR depends on the stock’s price and your trading style. Higher-priced or more volatile stocks usually have a higher ATR. There’s no one “good” number; it’s useful to compare the ATR to the stock’s price and past values to understand if volatility is rising or falling.

What is the best setting for ATR?

The most common setting is 14 periods, which works well for many traders. It means ATR is calculated using the last 14 days, hours, or candles, depending on your chart. You can adjust it to a shorter period (like 7) for quicker signals or a longer one (like 20) for smoother, slower changes.

Is ATR good for day trading?

Yes, ATR is useful for day trading as it helps measure intraday volatility, allowing traders to set better stop-loss levels and position sizes based on market movement.

What is the Best setting for the ATR Indicator?

The standard setting is 14 periods, but traders may use lower values (like 7) for faster signals or higher values (like 20) for smoother, long-term volatility trends.