Trigger prototype unexpected operation

[knauzers]

Hi guys!
Having problem with Trigger prototype operation. Following "problem expression" config:

{Template:LastRTT[{#SNMPVALUE}].count(#5,0,eq)}>=1 and
{Template:LastRTT[{#SNMPVALUE}].count(#5,0,eq)}<=4 and
{Template:LastRTT[{#SNMPVALUE}].count(5m,0,eq)}>4

However, after 10 (or more) sequent lost probes problem expression above has been triggered.
It shows FALSE when tested in "expression constructor". However, in production it is behaving opposite.
Will be glad to receive any ideas for solution, thanks in advance!

[superlava]

How often LastRTT SNMPVALUE gets updated?

[knauzers]

If you mean this:

[superlava]

Yes, I was looking for update interval. Also, Can you confirm what you are trying to achieve with this expression?

[knauzers]

Thank you for your responses, first of all!
So, my goal is to catch IP SLA probe flap with this expression. I have another trigger that checks last 5 probes and gets activated in case if all 5 has been failed.
But to avoid overlap of both triggers, I made that new flapping trigger with expression that says 1-4 IP SLA probes from last 5 should be down. Plus 5 or more down during last 5 minutes.
Hope you get my idea