New Post: Rank Detail not appearing

Hi, I just got the SharePoint 2013 Search Query Tool, and I really like it so far. I was very interested in the rank detail information and I am not seeing that appear in my results after choosing the "include rank detail" checkbox. I thought maybe I wasn't doing something correctly or perhaps this works for specific scenarios. Any info you can provide about proper use of this feature would be much appreciated.
Thanks!
Brian