It would be nice to have also changecount functions for trends.
Currently they exists only for history: https://www.zabbix.com/documentation/6.4/en/manual/appendix/functions/history

It seems to be similar to baselinedev function, but the return value of the baselinedev is horrible to comprehend
We need a easier function that returns the absolute count of value changes over time.

Could based on the trend avg value.

Example use case:
Item with an counter for something. But not the counter value it self is interesting, just the changes.
How often changed it in the last x days, weeks, months?

Example trend data:

Expected result at 15:01: