Gift Registry: Ability to set up conditions based on the number of items left.

I have set up a form that can be used to register for a program that we run.  I have used the Gift Registry widget to indicate how many places are left in each program.

How can I define a condition which will show a field if no items are left in the Gift Registry?  If no items are left then I want the form to display a text field link to another form where people can sign up to join a waiting list, but I don't want this field to display if not necessary.

I have set up a test form for this:  https://form.jotform.com/62286115612956

Thank you.

I have checked the widget and I could not a way to get the number of items left with conditions, I tried using the Form Calculation widget, but it does not seem to get the number of items either. 

I have also tried with other widgets like the Inventory widget and the Quantity Gift Registry widget, but I could not achieve it with them either. 

Currently you will need to show the message indicating to go to the other form if there're not items left. 

I will escalate the thread to our second level as a feature request, please do note that this may take some time, but we will update you via this thread as soon as we get some news regarding this.