judge trichomes on teh calyxes, not the leaves -- what those white or previously white hairs orginate.
pistils = threads in case translation is missed and an assumption on my part.
1- trichoems
2- pistils
3- density -- but only test this when you are 90% certain... not optimal to go around squeezing buds, but 1 or 2 colas with a gentle touch isn't a big deal.
use multiple indicators and you'll be more consistent.. .and able to more consistently test different points in harvest window.