As of now...you can't. There have been some unofficial news that google analytics could support this feature, but right now the only ones who can report their biggest clicks are those who get 1-5 clicks per day and monitor their accounts all the time.
no proof but 5.00 was highest and my average is 1.00 Not going to list niche though because of competition.
My highest 1 click earning was US$ 3.89 and that was just once. I wish if my every click was like that i would earn around more than US$ 50.00 per day.
All the time, I get $0.03 per click. But one click, the only one, that was my highest was a $1.20 click.
I just checked my account after reading this thread and i just got my highest click!! $3.36 on a site that makes me less than that in a week....
You are still behind me I got US$ 3.89 for a single click at my site Diabetes Corner a blog meant for helping and providing information to Diabetics.