Hi Sean, no, I do not believe that is (easily) possible. I admit, I did not check that yet, but if this was part of the WorkFlowEventHandler's functionality, the performance impact would be more significant.
I can only agree with Fred's comments in the other post (Check sign of changed values in Cube View within a Dashboard - OneStream Community (onestreamsoftware.com)).
I know it is not the same you are asking for, but you might also want to consider adding a confirmation step to the Form Input step to make the users go through that check. This does not impact performance unlike the Even Handlers and gives the users a clear process to follow.
So I left out the important fact that this application does not use WorkFlow.
