Creating a Rolling Average measure related to another measure (running total)

[dd-edwin]

Hello,

Newbie here.

I am running into a problem with trying to create a measure that is related to another measure.

My goal is to create a line chart with the X axis being the week number and Y axis being the averaged running total (+/- 14 days).

• I have a measure to calculate a running total per day
  

  net_quantity_running_total in Date = 
  CALCULATE(
  	SUM('Table A'[net_quantity]),
  	FILTER(
  		ALL('Date'),
  		ISONORAFTER('Date'[Date], MAX('Date'[Date]), DESC)
  	)
  )

• I have another measure to calculate the average of the running total over a period of 14 days

  net_quantity_running_total_rolling_average in Date = 
  IF(
  	ISFILTERED('Date'[Date]),
  	ERROR("Time intelligence quick measures can only be grouped or filtered by the Power BI-provided date hierarchy or primary date column."),
  	VAR __LAST_DATE = LASTDATE('Date'[Date].[Date])
  	RETURN
  		AVERAGEX(
  			DATESBETWEEN(
  				'Date'[Date].[Date],
  				DATEADD(__LAST_DATE, -14, DAY),
  				DATEADD(__LAST_DATE, 14, DAY)
  			),
  			CALCULATE([net_quantity_running_total in Date])
  		)
  )

• 
• On a monthly basis, the rolling average values show correctly
• When I drill down to weekly, the X axis does not split into 1-53 weeks. Not sure why it is only showing Week 1, 52, and 53. I'm thinking it could be my rolling average formula due to the LASTDATE variable. I'm not sure how to handle it to show weekly.
  

I assume it is because the WeekNumber is not actually part of the Date Hierarchy. Is there a way to add the week number to the date hierarchy?

Thanks,

[v-lili6-msft · Accepted solution]

hi, @dd-edwin 

Just adjust the formula as below:

net_quantity_running_total_rolling_average in Date = 
IF(
	ISFILTERED('Date'[Date]),
	ERROR("Time intelligence quick measures can only be grouped or filtered by the Power BI-provided date hierarchy or primary date column."),
	VAR __LAST_DATE = LASTDATE('Date'[Date])
	RETURN
		AVERAGEX(
			DATESBETWEEN(
				'Date'[Date],
				DATEADD(__LAST_DATE, -14, DAY),
				DATEADD(__LAST_DATE, 14, DAY)
			),
			CALCULATE([net_quantity_running_total in Date])
		)
)

Regards,

Lin

[dd-edwin]

Thank you Lin! That was it!

What is the difference when you reference the date each way?

'Date'[Date].Date

'Date'[Date]

Wouldn't these give you the same thing?

Thanks,