Legend in Line chart with two axis

Hi amitbisht51 ,

If you use legend you cannot add the secondary values and vice-versa, in this case and since it's a line chart I would recommend the use of a disconnect table with the calculation details plus the secondary value.

For example if you need to have years and average of something you would need a similar table to this one:

Calculation

2018

2019

2020

2021

SecondaryValue

Then using a switch measure for each value.

If you need help to setup this can you please share a mockup data or sample of your PBIX file. You can use a onedrive, google drive, we transfer or similar link to upload your files.

If the information is sensitive please share it trough private message.