Adding a Marker Line

The Marker Line child element allows you to add a value-based line to the chart, independent of the series:

A marker line is shown in the example above. The Marker Line element has attributes that allow you to set the properties of the line, such as color, thickness, and line style, and to set its caption and value. Its Value attribute accepts tokens and can be set from data, however, it's a straight line rather than a line based on a number of data points, so using a data token that represents a range of values will produce unpredictable results.

The Marker Line element has a child element, the Marker Label Style element, whichallows you to style the optional caption, by specifying its font properties, format, positioning, and alignment.