I need to get X, Y co-ordinates from an animated symbol

I am programming a game in edge.

I can get X, Y co-ordinates from symbols that I move myself like this:

sym.$("obstacle").position().left

However - if a symbol moves around in it's own timeline - the left & top (X, Y) - stay the same.

Say there is a small square moving across the screen within the symbol's own timeline. I need to reach into the symbol and get the changing X value.

How can I get this? Thx.