Targets in KPI

Hi all,

I am trying to build a KPI card, but stuggeling to connect my data model with an external target or maximum value for the distinct entries in my data.

here is a view of my sample external data :

I have relationship as:

The measure I am giving KPI value for :

1-Way Distribution = 

DIVIDE(
CALCULATE([Shipments],'Prototype Modeling_Freight'[Load Category]="1-Way"),
     CALCULATE([Shipments])
   ,BLANK())

Here is a link to screen recording to my problem statement 

Thank you