Inherits from IGSeries : NSObject
Declared in Series.h


Value overlay allows the user to plot a line through a specified value on a given axis. The chart view supports any number of value overlays. The user can specify any of the existing chart axes for the value overlay along with a numeric value. Depending on the coordinate system that the axis belongs to, the overlay will draw a line or an ellipse.




Specifies the axis used by the overlay.

@property (nonatomic, retain) IGAxis *axis

Declared In



A value that determines where the overlay is rendered. When using the value overlay with a numeric axis, the value maps directly to the values on the numeric axis. For category axes, the value maps to the index of the category. For date axis, the value maps to the time interval since 1970 as the reference date.

@property (nonatomic) double value

Declared In