[Observium] question about alert checker TEST

Hello,

I'm using alert checker with quite standard check:

ifInOctets_perc ge 90 ifOutOctets_perc ge 90

But sometimes the SNMP returns incorrect value like 134651%, especially in Nexus devices. I would like to prevent that with inserting test value like: ifInOctets_perc le 100. But i'm wondering if it's possible to do this in single rule in Observium that would look like this:

(ifInOctets_perc ge 90 and ifInOctets_perc le 100) or (ifOutOctets_perc ge 90 and ifOutOctets_perc le 100)

Or i need to create separate rules for both groups ?

Thanks