Allow custom ranges for colors

[akballow]

Hello love the card so much.

Will you be so kind to consider allowing us the ability to adjust the range for colors and add additional ones

For example right now there is only >0, 0, <0. I would like to be able to adjust these per device so I can have color based on how much or how little they are generating so I can see if something is not performing correctly.

For example the ability to do

1000 = red 500 = yellow 100 = green <-500 = yellow <-1000 = red

THANKS