"We have six and a half wins after the break, and having won six games in a row, we have put ourselves in a really good position," he said.
"A lot of it is about peaking at the right time. It's really important for us to hold our form. Port Adelaide did this last year, and they had only won seven games at the halfway mark, so there are a couple of games to go but at least we are guaranteed finals now.
"The top four spots are not secure, so we have not nothing to lose. I am glad we can play Geelong this week so we can find out where we are at."
While Geelong smashed the Roos by 106 points in last year's qualifying final, North is looking at Sunday's Skilled Stadium clash as a perfect litmus test.
"It depends what kind of Geelong turns up, but at the same time we are playing pretty good footy," Simpson said.