Meagan Longoria shows how to implement hierarchical slicing and filtering using DAX:
My friend and coworker Melissa Coates (aka @sqlchick) messaged me the other day to see if I could help with a DAX formula. She had a Power BI dashboard in which she needed a very particular interaction to occur. She had slicers for geographic attributes such as Region and Territory, in addition to a chart that showed the percent of the regional total that each product type represented. The product type was in the fact/data table. Region and territory were in a dimension/lookup table and formed a hierarchy where a region was made up of one or more territories and each territory had only one region.
It’s rare to hear me say “MDX was easier” but in this case, MDX was easier…