12 month Avg constant line on 13 month bar chart

[MK85]

Hi, 
I am looking for a DAX measure which can show me 12 month avg for previous 12 months as a constant line on bar chart. As shown below.

Thanks in advance

[v-huijiey-msft · Accepted solution]

Hi @MK85 ,

Thanks for the reply from @Greg_Deckler .

First, create a disconnected date table:

Date = VALUES('Table'[Date])

Apply this disconnected table as a slicer.

Create a measure:

12-Month Average =
CALCULATE(
     AVERAGE('Table'[Value]),
     DATESINPERIOD('Table'[Date], SELECTEDVALUE('Date'[Date]), -12, MONTH)
)

Set up the chart as follows:

The final page effect is as follows:

pbix file is attached.

If you have any further questions please feel free to contact me.

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

[MK85]

It works. Many thanks @v-huijiey-msft 

[Greg_Deckler]

@MK85 (3) Better Rolling Average - Microsoft Fabric Community

[MK85]

It doesn't work for as I have dates on x-axis from date table and my context is changing every month, which gives me variable avg for each month.