Yoohoo,
I do watch the clock now all the time and never miss hourly closes (didn't specially do 10mins before/after though, but watch how hourly bar develops)...
And actually this become easy to do now and really improves chance to catch the nice swing... I definately notice that those 5min swings which are in confluence with bigger have higher probability and tend to run further...
Watching big TF's along with S/R are two most valuable tools I've learnt during past month and already use with success...