Marking a Token on isShaken using ChatSetAttr

I'm using to attribute monitoring script from  this thread  so that when the Savage Worlds Tabbed sheet attribute 'isShaken' = 'on', the token has a red marker, and when isShaken = 0 the red marker goes away. I was trying to integrate this with ChatSetAttr so that Shaken status could be set by a macro (the shaken field on the sheet can't be dragged out like a roll). But the attribute change doesn't seem to register and mark the token when it is set that way, only when actually clicked on the character sheet. Do I need to change something to make this work? !setattr --name @{selected|character_name} --isShaken|on

When the API changes (most) things, it does not cause an Event to occur. Events are what trigger behavior in the various scripts. ChatSetAttr allows you to register a function to be called when it makes changes.  You can add this to the linked script to get that to work: ChatSetAttr.registerObserver("change",toggle);

Thank you!