Is it possible to set an alert to trigger a year over year change? For example, if I would like to get alert if this month's (2020) sales is lower than last Jan (2019)?
Looking at the options for a YoY by month alert, have you tried the following:
Metric - Most Recent Month
Meets this condition - Decreases by %
For this value - 1%
That seems like it would do it.
Hope this helps.