KE: < 2 = green, < 5 = orange, ≥ 5 = red
Since this KE thingy was introduced, there where quite a few discussions on different medias about it. My personal observations makes me feel that it is 'badly' used to judge an account, because it really depends on what's going on in the RL of someone.
This said, i'd like to give my two cents on your chosen thresholds. With what i saw and experienced over the last eight years i'd personally would set that on -
KE: < 5 = green, < 7 = orange, ≥ 10 = red.
Could it may be possible i can set these by myself in your tool?!