I saw the main thrust of the composition in two ways, first as a fulcrum:
Then I saw it as a radial composition with the circular movement. :
Next, I used a Sharpie pen to work out the black and whites of the painting which I think more clearly shows the radial movement.
I've posted this for comments in the March 6 Composition thread at Wet Canvas, hosted by Larry Seiler. I hope I haven't missed the mark on the composition of this painting.