I have a basic understand of the technique. From what I'm thinking, it's a defensive stance, which doesn't aim to physically stop an attack from coming at you, but rather divert an attack using circular motions. An example being a punch being thrown at you could easily be deflected using your right hand in a way to push the incoming fist from hitting you. Of course, this would mean the move doesn't stop the attack, but forces it to miss you.
That being said, this move wouldn't be so good at defending against attacks that come at you from the side, like someone throwing a hook at you, or a roundhouse kick for example. I'm guessing because of how this ability works, it's a lot stronger against attacks that are directly thrown at you, instead of in a roundabout way.
I suppose what I'm trying to say is that it's much more effective at using their force against them to miss, rather than trying to fight the force yourself in order to get the same effect.
As for a usage of the technique, like I've mentioned previously it's best used as a diversion. I'll try to give some RP kind of example, much to my demise. I'm not the best when it comes to taijutsu, especially in practice, so please forgive me.
The man's sudden somersault did startle me a bit, with him jumping and tucking in his legs for rotational force. I expected him to come out of it with a kick using one of his legs, which much to my expectations, he did so with his right. It was aimed for my left shoulder, but fortunately I knew what to do regarding the situation. I began taking a defensive stance with my arms spread out in anticipation of the impact. After seeing his right leg extend for the kick,I make a swift movement with my left arm, forcefully swinging it around in a counter-clockwise direction to cause a direct impact between the back of my left hand, and his right leg. The intent of the move was to use the force of his movements against him, and pushing the attack away from me, so that at most it would graze the left side of my body. The move itself would also work in my favor, as an unexpected landing would cause the man in front of my to stifle his landing. With the opening created by such an effect, using my right hand I tense the muscles, and thrust towards his chest with an open palm, hopefully with enough force and the lack of his own stability to knock him over.
tl;dr wax on, wax off