A **Regression Line** is a line of best fit through the selected data points.

This line is calculated using a linear regression calculation.

To apply a regression line to a price chart, left click at the date the regression line is to be calculated from, then move the cursor to the date of the regression line's end point and click a second time.

The price level at which the clicks occur does not matter. The software uses a mathematical formula to calculate a gradient using the values of the price data type for each trading interval between the selected dates.

The default price data type is **Close**. Users can change the data type by selecting **Open, High, Low** or **Close** from the **Calculate Using** command's drop-down menu in the **Regression Line Properties** dialog box.

In the above example, the green dashed **Regression Line** is calculated using the **Close** price data, while the red dashed **Regression Line** is calculated for the same time-period using the Low price data.

After placing the line on the chart, it can be moved and resized by dragging the "handles" common to Your SOFTWARE tools.

As the regression line is re-positioned or resized, its gradient (both angle and length) will be recalculated and re-plotted onto the screen.

The line's position and size can also be manually altered by entering new **Start / End Dates** in the **Regression Line Properties** dialog box.

Double-click the line to open the **Regression Line** properties dialog box.

Use the standard properties functionality to adjust the line's position (date), color and style properties.

The pop-up menu (single right mouse click) for **Regression Line** has the standard links: **Properties, Cut, Copy, Delete, Lock** and **Help**.

In addition to the standard links, the pop-up menu includes the **Parallel Trendline** command.

Click this to create a parallel line.

**Note** - This function will create one parallel Trendline, __not__ a duplicate **Regression** line. The resulting line is not a **Regression** line and will not have regression line functionality and its gradient will not be recalculated. When you move or resize the new line it will adhere to standard trendline functionality.

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