Object
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  +--xp.charting.Band

Band is one of the most useful objects when it comes to highlighting information in the chart area. They allow you to highlight a range of values associated with any of the axis by drawing a color frame in the chart background. Bands allow the user to easily pinpoint data that falls within a range of values associated with any of the axes. For example, in a scientific application you may want the user to recognize points that plot between 20 and 40 with a blue stripe object The range of the band (start, end) goes in strict relationship with the Axis scale that is related to, as follows:- If the band is related to a numerical axis, the band range (start and end) is defined according to the scale values set for that particular axis.For example creating a band for the Y axis is defined by two numbers. (i.e. start = 30.5 , end = 50.75)- If the band is related to a categorical axis (X axis in charts other than XY Plots), the range (start, end) is defined by numbers specifying the point range you want the band to cover.For example creating a band for the X axis is defined by two number (Point index) numbers. (i.e. If you want to create a color band from point = 3 to point = 10) The start value must be lesser than the end value. You can associate a band to an axis using the axis property. You can set the color of the band and its alpha with the fillColor and fillAlpha properties. If you want to highlight a particular value on an axis (instead of a range) you can use the Line class.