@karlenigma If you need to do it in real time as the user change the form or as the user receive the lines your only option is to disable the Mark All button and use

lineInit

or

fieldChanged

or

validateField

. As @erictgrubaugh mention

Mark All

button does not trigger any entry point, I was checking that, does not trigger

fieldChanged

, does not trigger

lineInit

, does not trigger

validateField

.