The calculation of the **Average True Range - J Welles Wilder** is similar to the Average True Range indicator's in that both first measure the difference between the High and Low price of the interval (the range) and then use that **True Range** value in their subsequent calculations.

The **Average True Range** calculation ascertains the "true" range for a number of intervals and then averages those true range values.

The **ATR-JWW** does not average all of the previous intervals' TRs, but rather gives more weight to the most recent **ATR-JWW** value and only averages it with the current interval's TR result.

The resulting **ATR-JWW** graph gives proportionately much greater weight to more recent results and consequently has a smoother appearance.

The user can set the number of previous periods that will be averaged to produce the ATR J Welles Wilder for a given interval.

Type in a whole number in the **Periods** text box in the **Parameters** tab of the **Average True Range (J> Welles Wilder) Properties** dialog box.

The default number of periods is 14.

The **Average True Range** is displayed in an indicator window below the price chart.

The exact display of the plot is controlled on the **Plots** tabbed page of the **Average True Range Properties** dialog box.

The **Style** selected for the plot can be one of the following: **Solid, Dashes, Dots, Points, Histogram** or **Step**.

Once the style is selected the **Color, Weighting** and **Visibility** can also be controlled from this page.

The **Scale's** display is controlled from the **Scale Settings** and **Scale Appearance** tabbed pages.

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