Hi Meghan,
The below text mode should do it on an issue report.
displayname=
linkedname=direct
namekey=plannedCompletionDate
querysort=plannedCompletionDate
styledef.case.0.comparison.icon=false
styledef.case.0.comparison.leftmethod=plannedCompletionDate
styledef.case.0.comparison.lefttext=plannedCompletionDate
styledef.case.0.comparison.operator=ne
styledef.case.0.comparison.operatortype=date
styledef.case.0.comparison.rightmethod=resolveTask:plannedCompletionDate
styledef.case.0.comparison.righttext=resolveTask:plannedCompletionDate
styledef.case.0.comparison.trueproperty.0.name=fontstyle
styledef.case.0.comparison.trueproperty.0.value=bold
styledef.case.0.comparison.trueproperty.1.name=textcolor
styledef.case.0.comparison.trueproperty.1.value=d30519
styledef.case.0.comparison.truetext=
textmode=true
valuefield=plannedCompletionDate
valueformat=atDate
One thing to point out is that the comparison between the two dates will also take into consideration the time. So if the planned completion date of the issue is 12th April at 9:00am, and the planned completion date of the task is 12th April at 9:01am, this will still highlight in red.
Best Regards,
Rich.