I may have the result you need, but I may have taken more steps than needed, too.
[I edited this to remove an unnecessary step]
I found the top ranking comment count:
Once I had this, an LOD calc pulled the actual URL from the detail:
This is the guy I used in the dashboard URL action.
I'm not sure if you wanted them ranked by comment count... but you can certainly tweak that. I'm also unsure what will happen if you have two URL's with the same number of comments on the same day-- just something to be aware of.
I fully suspect there are more elegant ways to solve this problem, but hopefully it will give you some ideas!
Good luck! --Michael
Instagram Dataviz.twbx 503.9 KB