Everything I ever read said it should be high. My local shop set me up about square & I went crazy trying to tune. Finally after much advice from this board I just moved it up a bunch. Looks funny at rest but t shoots much better. I ended up around 5/16" high but alot of people said start at 3/8". When was close to square my arrow was pushing the rest way down & then the rest was flipping up my nock end giving me a nock high tear in paper. Shot good like that with field points but broadheads were several inches lower. Now they hit the same. Seems all bows are different, but again all the advice I got was to be nock high to some extent.