Your elbow is just a tad high but otherwise your posture is excellent; you really communicate the motion and action and the intent, and even the pointing lines that flow down your arms and up the bowshaft to the arrow.
Nicely done; looks like a hasty draw back, because of the high elbow, but it isn't too high for accuracy so that actually lends just a bit of aid to the purpose of the image.
Also, very good angle for this pose with the camera; your photographer did a good job.
Thank you for the detailed critique, I appreciate it. The typical bow-stance has to be altered a bit for photogrphs, otherwise it's just a mess of hair and a bow, none of my face. My elbow doesn't exactly play into that though, and I'll use that tip when shooting for real, too. I just don't want to chicken wing it either, so there's a happy medium I'm yet to find. And my photographer was great! She had angled the shot that way because she didn't want the street in the background (We were at a public park), she only wanted the beautiful autumn leaves.
One slight niggle; The leather guard on her forearm is slightly out of place. It should fully cover the inside of the arm. It's intended to guard the arm against the bowstring snapping back when the bow is fired. Sorry to nit-pick