Missing Last Day of Month in Line Chart

Hi,

I'm trying to display current Vs previos month volume in the same line chart (X axis - Days ofmonth, Y axis - Volume).

When the current month has less days than the previous month the X axis display only the days for the current month, causing the previous month's volume data to disappear.

For example, if i'm comparing October Vs November then the X axis ends with 30 although October also has 31.

How can i avoid this issue?

Thanks!