Today we can only show one value in the gauge chart.
This type of visualization is frequently used to display a value, but also a reference value. Usually displayed as a line in the gauge area.
The idea is to implement a way to define a second value (reference value) and to be represented in the gauge as a line with the option to display it´s label.
It is also desirable that we could color the gauge based on this reference value, using a color when it is below or above the reference value.