dynamic filter from dashboard

Hello, 

I wanted to create a chart based on 6-7 tables where ons is master table & rest is child table. I have put slicer on dashboard , now i want to filter or get number of rows affected from filters from masters on child tables. I searched on forums and found that we can not filter queries based on slicer value. Can anyone help on same or if there is alternate approach ? 

Do let me know.