This is the "Super Phantom Move". It is all PMTS Direct Parallel. It is all about a "Narrow Stance", "a Lifted Foot and Ski, moving and standing on the "Little Toe Edge". Everything PSIA rejects, about PMTS Direct Parallel and it is being used to win World Cup Slalom races by 3 seconds.
This is explained in detail in my first 2 books, and videos, "Anyone can be an Expert Skier", 1 and 2.
This next photo, is after the tradition, in the early phase of engaging. The inside foot is pulled back, still lifted. Inside ski is tipped more than outside ski, this means she is setting up her hips to the inside of the arc, before pressure is developed. Skiing is about relaxing into angles, not achieving pressure through forceful pushing or extending. This is highly evolved technique, not seen often at the junior or even development Team level. Only the best figure this out. However it can be taught trained and learned at an early age with correct coaching.