If I understand, a user will fill in a form (so you are using ui-form?). One of the fields will be a numeric field and you want it added to your chart. Is that the idea?
Will you have a range that the number can be?
How frequently will numbers be added?
What do you want to happen if the user refreshes the window or closes it and reopens it?
Do you intend to store the data anywhere?
thanks, I figured it out...i used a change node instead of a function node and everything is working as I expected. Thanks again