FiveFrameSwing
Banned
The rear elbow will work down and through, rather than down and pinned to the torso during the rest of the swing.
One of the best things you can do is look at video of top hitters, and start to identify some of the differences between what they do and what your DD is doing.
This is one of my favorite hitters to study...Miguel Cabrera – Page 6 – NOONTIME BASEBALL
Please make a GIF showing how this hitter has her rear elbow pinned to her torso.