What could be indicated if an orthotic rocks on the anterior edge of the post?

When an orthotic rocks on the anterior edge of the post, it suggests that there may be an issue with how the device is tapered. Tapering is the process of gradually reducing the width or height of the orthotic towards the front, allowing for a smoother transition and better fit within the shoe. If the tapering is incorrect, it can lead to an imbalanced surface, causing the orthotic to rock rather than sit consistently on the ground.

In this scenario, the rocking motion points to the possibility that the anterior end is not adequately tapering away from the post. If it were tapered correctly, it would provide a more stable base, preventing rocking. The other options, while they may relate to issues with orthotic fit, do not directly address the specific problem of rocking at the anterior edge caused by improper tapering.