Trigger doubt

[talishka]

Hi, i have a small doubt.. i don't understand what this trigger means.. This is a check to test if a website is up and running.

{my.server.com:web.test.fail[My Frontend].last(,1)}=1

The colon confuses me.. it would be the same to pout last(1)}=1?Some explanation please?

If i want to achieve to evaluate the last 2 results instead of the last result to activate the trigger, what would be the best approach?

Thank you!

[DmitryL]

.last(,1) is 1 second timeshift. So it will evaluate last value 1 second ago which is pretty useless.
If you want to evaluate 2 values, use avg/min/max, because .last will always check just 1 value.