Tuning manager doesnt show hourly data at all, I am able to get minutely and daily data.
HCS and agent are on 8.5 version
When you open Tuning Manager you will find an option "Create" on top right of the window.
Create a new report window and save it.
I created one which will look like this.
After creation you can pull a report with this new Report window.
Retrieving data ...