I have a field on my form that need to be "required" when the approver makes changes. I first tried referencing the field itself (TradeApproval), and when that didn't work, I tried using a variable to store the value. Either way, the validation does not happen and no validation message appears. Is there a trick to make validations work on a form?
there is an additional brace in your formula:
Remove the brace and the rule should at least validate correctly.
Once the new rule builder will come the counting of braces will hopefully be over.