Line chart showing the total line after adding the field for the legend

[mariella2]

Hi, I am building a report in Power Bi desktop. I have a line chart with the Calendar[Date] on the X axis and a measure to calculate open risks on the Y axis. This is the measure:

Open Risks = CALCULATE(COUNTx(FILTER('Risk','Risk'[Creation Date]<= max('Calendar'[Date]) && (ISBLANK('Risk'[Mitigated Date]) || 'Risk'[Mitigated Date]> max('Calendar'[Date]))),[Risk ID]),CROSSFILTER('Calendar'[Date],'Risk'[Creation Date],None))

Then I add the Rating field in the legend so that the Total Open risks is split in four lines respectively Low, Medium, High, Critical.

My problem is that I'd like also to visualise a line for the total Open risks in the same line chart to show the trend over time.

Something like this:

I tried duplicating the same visualisation putting them on top of each other disabling some settings such as title, legend, etc, but it is not something easy to mantain. 
Do you have any idea how to solve this? Do you know a custom visual that would do what I want?
Thanks a lot in advance.

[amitchandak · Accepted solution]

@mariella2 , You can do that in line and Clustered column chart visual not in line visual. As in line visual secondary axis/line is not supported with legend

In line and Clustered column visual line is supported with legends on primary axis

[mariella2]

Thanks for your answer. I went to add the clustered column chart with the line, but I don't see the 'Line value field' as shown  on different website.

Edit: found it.

P.S. Anyway do you know any custom visual that would work like in the image I have posted above (Line chart)?