Measure with FILTER funtion does not react to slicer

[CalleWagenaar]

Hello, 

I created the following measure to create a time freqency graph per hour:

Time count oer month =

CALCULATE ( COUNT ( 'Data set'[Vehicle] ),

    FILTER ( ALL ( 'Data set'),

        [Start booking] <= SELECTEDVALUE ( 'Time'[Time] )

            && [End Usage]>= SELECTEDVALUE ( 'Time '[Time] )

    )

)

This is an example of the two data sets I used in the measure:
1. Data set: (This is a simplified version I made for the question)

2.Time: 

This is the graph I got: 

(Based on slightly different values, but you understand the idea)

 I want to create a slicer for the groups. When I click on group A only the times on the vechiles in group A should be visbile in the bar chart. How can I do this? 

Thankyou in advance!
Calle

[amitchandak]

@CalleWagenaar , Hope in this time table is not joined with any of the time.

In this same case as HR, there you have a date

Power BI: HR Analytics - Employees as on Date : https://youtu.be/e6Y-l_JtCq4
https://community.powerbi.com/t5/Community-Blog/HR-Analytics-Active-Employee-Hire-and-Termination-tr...