Currently the green light indicates errors from .01 - .39, and orange kicks in for errors over .40 - and I'm not sure when the red boundary is. I don't find this particularly helpful, as I don't really consider anything below .2 an error to worry about, but I would like to know about errors over .2.

I guess I have got used to the boundaries on other sites, so apologies if this all sounds am bit pernickety. I believe most use .2 as the threshold for errors, and .8 as the threshold for blunders - can I suggest you use these settings for orange and red? I am not sure what the equivalent figures are for cube errors. I would drop the green light altogether as I find it distracting.