Is it possible to get skeletal tracker position?

Hey there!

I have been playing with the skeletal tracker template, 
and tried to figure out how it works.

I was wondering, does each tracker hold a current position for
a compatible body part - and if so, can we access it, and how can we use it?

for instance, I would like to place an Image on screen and trigger action depending on specific wrist closeness to the image position. (is it possible to get a code example for such use?)

Thanks!