Does UE 4 support ExposeTm helper from 3ds max?

does UE4 support the use of ExposeTM helpers from 3DS Max for the production of a twisting forearm in a bone hierarchy

I think you would have to bake in the animation from your helper if you wanted it handled purely in 3DS Max but you can easily set up rotation bones in your anim blueprint using Skeletal Controls. Handling this in-engine could allow the bones to work even when simulating physics.