|Member_Expression||MDX expression that returns a member.|
There is a calculated member that consists of month level members between 2 months ago and today.
Then the following function would return a set of the months from Time dimension that belong to the calculated member 'Last 2 months'
You can use this function to calculate the Issues created year ago vs. the last 2 months from previous expression. That would calculate results for issues created from the same period (last 2 months) year ago.