Is it possible to create a trend notification in zabbix 2.2?

Question

Zabbix

Good afternoon!
It is necessary that with a certain growth trend of the chart, a notification would be issued.
While I see only when the threshold is reached.

Answer 1

There are already trends in 3.0.
In 2.0.8, I set trends like this
Used RAM (trend per minute)
last("vm.memory.size[used]")-last("vm.memory.size[used]",#2)
Update the element once per minute
Well, the trigger
Trend of RAM consumption on {HOST.NAME} exceeded 50 Mb/m
{Trends:vm.memory.size[trend_m].last(0)}>50M