Dynamic Quartile slicer

Hi,

I am trying to dynamically calculate quartiles for a certain column based on the selection of a calculated column.

So, I have a list of 100 account Ids with 2 columns (1) Normalized Electric Usage (Norm_Usage) and (2) Heating & Cooling Load/Square Footage (H&C Load/SFT). I have divided these 100 accounts into 4 quartiles (based on column 1 Normalized Electric Usage) by creating a calculated column using a DAX function. (I have attached a sample dataset)

Step1: Create 4 quartiles based on column Normalized Electric Usage. Each quartile (1, 2,3 and 4) have 25 accounts each. 

Quartile(Norm_Usage) =
var Q1=percentile.exc(Test[Norm_Usage],0.25)
var Q2=percentile.exc(Test[Norm_Usage],0.5)
var Q3=percentile.exc(Test[Norm_Usage],0.75)
return
if(Test[Norm_Usage]<Q1, 4, if(Test[Norm_Usage]>=Q1 && Test[Norm_Usage]<Q2,3,if(Test[Norm_Usage]>=Q2 && Test[Norm_Usage]<Q3, 2, 1)))

Once I have done that, I would like to be able to select and filter by the column "Quartile(Norm_Usage)" and have a query dynamically calculate 4 quartiles (based on column 2  Heating & Cooling Load/Square Footage (H&C Load/SFT) values) for the accounts that show up within each quartile.

Step 2: When I select Quartile 1 in the column Quartile(Norm_Usage), it has 25 accounts. Based on the Heating & Cooling Load/Square Footage (H&C Load/SFT) values of these 25 accounts, I want to dynamically calculate and group these 25 accounts into 4 quartiles using the similar DAX function used above.Thus the 25 accounts should be broken down into 1-4 quartile values based on the distribution. This is the part where I am stuck. How should I use a DAX function such that the quartiles are calculated dynamically based on the quartile value selection of the Quartile(Norm_Usage) column (values are 1, 2, 3 and 4).

Finally - this is how I would like my dataset to look like (it is a sample dataset filtered on quartile 2 of Quartile(Norm_Usage column):

Appreciate any help with this.