Hi, I'd like to fetch historical morningstar data so that i'm able to create my own measurements, such as Quarterly EPS growth. I can currently grab a shares Basic EPS by filtering through a coarse / fine filter and using fine.EarningReports.BascEPS.OneMonth. I was wondering if there is a way i can calcualte quarterly EPS growth by doing something like...

((Current) OneMonth EPS - (3 Months ago) OneMonth Basic EPS ) / (3 Months ago) Basic EPS

Let me know if you have any ideas for me and thanks for reading!