Creating a rolling standard deviation within the new Magic ETL

ap1999

I'm running into an issue where I'd like to create a rolling standard deviation within Magic ETL.

For example: A standard deviation calculation where each row uses the sample of the previous 90 rows. I was able to do this within MySQL however, for easier access of coworkers, I'd like to create it within Magic ETL.

Is this possible, if so how should I go about it?