@asspirin
I am looking at the wiki and the listed calculation is this:

Am I missing something or what? I made another toon with 610luck and 23% crit chance. According to the formula above,
triangle_sign = Chance - Chance * (1+ Luck/1000) = 0.23 - 0.23 * (1 + 610/1000) = -0.14
Biased Chance = Chance + triangle_sign = 0.23 + (-0.14) = 0.09
edit:
@GorTavaro @kellewic
After a quick thought, maybe the formula is actually

this way, with my previous data,
triangle_sign = 0.23 - 0.23 * (1 - 0.61) = 0.23 * ( 1 - 1 + 0.61) = 0.23 * 0.61 = 0.14
Biased Chance = 0.23 + 0.14 = 0.37
So basically, without taking in account other luck bonuses (from talents and items)
6CHA = 0.9x actual chance (23% -> 20.7%)
19CHA = 1.225x actual chance (23% -> 28.2%)
20CHA = 1.45x actual chance (23% -> 33.4%)
I think it's WAY MORE intuitive to show that the actual critical chance in this case is 37%, instead of showing 23% crit chance and 610 luck.