yuvan29 

New Measure

Average Calls Last 3 Days = 
VAR SelectedTime = SELECTEDVALUE('YourTable'[Time]) 
VAR SelectedDate = SELECTEDVALUE('YourTable'[Date]) 

RETURN
AVERAGEX(
DATESINPERIOD(
'YourTable'[Date], 
SelectedDate, 
-3, 
DAY
),
CALCULATE(
SUM('YourTable'[NumberOfCalls]), 
'YourTable'[Time] = SelectedTime 
)
)

Add a Line Chart

Put your Time on the X-axis.

Use the measure Average Calls Last 3 Days for the Y-axis.

💌 If this helped, a Kudos 👍 or Solution mark would be great! 🎉
Cheers,
Kedar
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