do you like couch lock or no?
if you like the couchlock, sleepy-time buds, let it amber up at least 50% no matter where you look, excluding larf.
While i see a pistil, that looks like trichomes on a leaf or sugar leaf... so, those won't be the ones you want to key in on...
trichome coloration 10-70% or more depends on personal preference... try it all before assuming.
pistil coloration and eventually will coil up (not 'shrink' that's just the calyx bloating up)
density of nugs.. plant dependent but a good third cue, but save it for last or jsut don't do it often, lol.. cause this damages the plants when you touch and squeeze soemthing, even if gentle.