10 years ago by
A Pianist
If your wrist is going up and down on every note of a scale, your fingers aren't working and your arm is trying to take up the slack. It is a result of your training.
As for curling the fingers, the degree to which they curve or curl depends on the sound you want. Some people feel the older composers warrant more of a curling action while the more modern composers, with their bigger, fuller sound, require a flatter finger. This is to a certain extent true but it's a gross generalization - there are many exceptions.
Welcome to the Forum!
AFF