Picking winners in horse racing is known as handicapping. It is the art of selecting winners, using all the information and statistics available. It is more of an art or skill as opposed to a science. This tutorial should help you become a better handicapper or race picker.icking winners in horse racing is known as handicapping. It is the art of selecting winners, using all the information and statistics available. It is more of an art or skill as opposed to a science. This tutorial should help you become a better handicapper or race picker.