Sounds right. As you do an ascending scale with the right hand, for example, your arm will move smoothly to the right, up the keyboard, and your wrist will swivel slightly back and forth in the horizontal plane so that whatever finger is playing is in line with the forearm. The feeling you DON'T want to have is that your fingers are pulling the wrist and the arm behind them as the fingers walk up the keys. Instead, the big motion is with the arm, sweeping up the keyboard, a smaller motion is the hand pivoting at the wrist the keep the playing finger lined up with the arm, and the smallest motion is the finger striking the key.