When you click on someone's trade, it should have a checkmark next to the time stamp. For example: http://profit.ly/1Mrmre. Right under my description of the trade, you see the time stamp and the check mark

I made a whole blog post about that some time ago...check it out: http://profit.ly/user/tompumpanddump/blog/how-to-cheat-on-profitly-and-show-any-pl-you-want