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In the meantime, can someone suggest how to automate a year-to-date per cent change calculation? How to average of months so far this year? (probably an easy step) How to average the months to this point last year? (seems to me to be the difficult part) Then calculating the per cent change between.....

Please include a function that provides year-to-date values of time series.
e.g. @ytdave() that would average the months of the year so far
and @ytdsum() that would sum the months of the year so far

thank you!!