The moon position is more important that the moon phase. When the moon is directly overhead or directly underfoot is when deer activity/feeding is at its peak. You'll notice that deer activity increases as the moon approaches either overhead or underfoot.

Moon phase also plays some part but not nearly as much as the position. If you have an early moon rise the deer activity is noticably increased and the same as a late moon set.

I use the moon position as well as watching the barometric pressure history throughout the day with weather coming in or moving out.

My wife gave me the Deer Hunters Edge several years ago and I use it religiously every day I hunt.

Normally the moon position isn't in the most favorable location but when it's close, pay close attention to the stands that you have near feeding/bedding areas.