So why do experienced traders care about the "Option Greeks?" It is because they are a valuable tool in predicting what will happen to the price of an option as market variables changes. This may seem difficult to comprehend at first, but option prices do not move exactly with the price of the underlying asset. However, any trader that dedicates the time to learn the essentials will begin to understand what factors contribute to the movement in the price of an option, and what effect each factor has.