Harvest time?

Hello everyone! Im a new grower, this is my first batch of plants. The strain is `Dark-Devil` its a hybrid. These babies germinated 11 june.
I just have no idea when I have to harvest, some people say to look at trichomes and some to look at pistils.
Hope that someone can help me by the hand of some pictures:

You still have awhile.
Answer is you should be looking at both. Also note that if you are checking the scope you need to look at the calyx not the leaf. The bud is still pushing out new pistils so it's not done yet. Still much swelling to take place.