I'm a professional horse racing handicapper.
Horse racing
Horse racing is an equestrian performance sport, typically involving two or more horses ridden by jockeys (or sometimes driven without riders) over a set distance for competition. It is one of the most ancient of all sports, as its basic premise – to identify which of two or more horses is the fastest over a set course or distance – has been unchanged since at least classical antiquity.
Horse races vary widely in format and many countries have developed their own particular traditions around the sport. Variations include restricting
Handicap (horse racing)
A handicap race in horse racing is a race in which horses carry different weights, allocated by the handicapper. A better horse will carry a heavier weight, to give it a disadvantage when racing against slower horses. 
The skill in betting on a handicap race lies in predicting which horse can overcome its handicap. Although most handicap races are run for older, less valuable horses, this is not true in all cases; some great races are handicaps, such as the Grand National steeplechase in