Originally Posted by Bob Barnes/Colorado
It's always a good idea to have your boot setup checked. You may well have an alignment issue, that could be solved by a corrective footbed, a cuff alignment, a different boot (i.e. the new Fischer, which is great for the commonly over-pronated, underedged skier), and/or a canting solution.
An a-frame often does indicate an "underedged" skier, but it can as well result from a movement issue. In your case, we can't rule out the alignment possibility, but I think there are probably some movements you could focus on either way.
If it's an underedged alignment issue, the a-frame results from the need to create excessive knee angles in the outside leg, in order to get the ski to hold. You may well be doing that, but even if you are, you are clearly NOT doing much with your inside leg--which is the other common cause of a-frames.
My suggestion is a) have your boot setup checked, and b) focus on more actively tipping your inside foot and leg, and driving your whole body forward through the turn.
From these pictures, it looks like you tend to settle down, inside, and back as the turn progresses, creating excessive hip counter (hips facing the outside of the turn too much) and hip angulation. Your inside thigh points strongly to the outside of the turn, rather than into the direction you're trying to go, as it would if you were running through a turn. If you would drive that inside thigh into the turn, it would activate the inside leg, and pull your whole body a bit more square to your direction of travel (don't overdo this, or opposite problems can arise). Your thighs and shins would become more parallel, and the a-frame would, at least, diminish. Think of the movements you would make if you were skating, or doing "1000 Steps" through the turn. (These are not simple things to describe--if you aren't absolutely clear on what I'm suggesting, there is no substitute for a competent, high-level certified pro.)
My guess is that your turns begin with a pronounced "up and over" move to get you out of the back seat and into the next turn. Am I right?