Indicators pinpoint important values or ranges on the gauge axes. Each gauge can contain an unlimited number of indicators. Adding or removing gauge indicators is done by modifying the contents of the Indicators collection of the gauge.

There are two general classes of indicators – value and range indicators. As the name suggests value indicators are used to pin point a value whereas range indicators show a range of values on a gauge axis.

The following table shows the possible types of indicators that can be contained in a gauge:

Indicator Type	Description	Applies to
NMarkerValueIndicator	Represents a marker shown at a specified value on the gauge axis	Linear and Radial gauges
NNeedleValueIndicator	Represents a needle connecting the radial gauge center point (pin) and a point specified in axis scale coordinates	Radial gauges
NRangeIndicator	Represents a range of values on the gauge axis.	Linear and Radial gauges