well, from my experience, every tick (or two/three) resets rates, so if you get a HQ and instantly click again, that item also will be HQ, same with missing etc. I once got 4 HQ in a row with 2% HQ rate doing this, and as you know, thats a pretty low rate :P (had used the +50% hit rate skill that time, so no misses). Ive also gotten 5/6 misses in a row on a leve where i had 80%+ chance of actually hitting :P