Running a rule only at certain times

I have a rule that kicks of a process that chews up a bit of system resources. Because of this I only want it triggered at certain times. I have as the first rule for my folder to be:
If all of the following are met
--> current time is after 6:00am
--> current time is before 8:00pm
Then do
--> Ignore
to have the rest of the rules trigger only between 6:00am and 8:00pm. Is this right? It seemed to trgger anyway.
If all of the following are met
--> current time is after 6:00am
--> current time is before 8:00pm
Then do
--> Ignore
to have the rest of the rules trigger only between 6:00am and 8:00pm. Is this right? It seemed to trgger anyway.