Describe the feature:
Feature needed for composing line charts with lines that are able to change colors based on the values they are tracking.

Describe a specific use case for the feature:
My use case is referred to a temperature dashoboard: on timeline series I need the line that is tracking the temperature, starts as green and if the value of the temperature is above 26°, the line should become yellow/orange (starting from 26-value of y-axis) and eventually, if it exceeds 28°, starting from the 28-value on Y-axis it has to change to red color.