Taking a penalty shot is a demanding task. It takes courage, skill and practice. Most importantly, a good penalty shooter requires the ability to control their nerves.
Different goalies look for different tells when trying to stop a penalty shot. Some watch the ball, some watch the player and others just guess. Although, in the end, every time you try to stop a penalty shot you are guessing which way to dive (or not dive), there are certain things to look for that can help you make an educated guess.