[_THISROW_BEFORE] & [_THISROW_AFTER] in Action Condition

[Fabian_Weller]

In a Form I have a Form Saved Event Action "App: go to anotherview within this app" with LINKTOFORM().
This Action should only fire, when [Column1] changes.

So I thought, in the Action condition I could use:
[_THISROW_BEFORE].[Column1]<>[_THISROW_AFTER].[Column1]

But then the Action would not fire at all.
I suspect that it would not work because: When change [Column1] and save the form, the LINKTOFORM() Action can not understand what the [_THISROW_BEFORE].[Column1] was.

Am I right? Is there any other solution?