How to skip custom validator  if other validators fail

I have a custom validator that checks data from db, the validator is at the end of the page so it gets called last. If there already are fields in the form that don't validate i don't want to run my custom validator since will not submit anyways and no need to put extra strain on the db. How can i accomplish that?

Sorry for the confusion. the triggerEvent="click.add" should be triggerEvent.add="click"
I am using Flex 4. The validation is fail if the user don't input anything. Does clickHandler still process the code even though the validation is fail?

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