So a slow, swaying tail is ok, but a flickering tail indicates nervousness.
I know that understanding a deer's body language is important in hunting, so I am trying to better understand it. I found a few good articles that talk alot about glands and rubs, even about the tail "flash", but none that talk about wagging.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote!" B. Franklin