So often people talk about credit spreads and focus primarily on the Greeks, while ignoring Technical Analysis. Delta, Theta, Vega, and Gamma are excellent measurements of risks associated with option positions, but Technical Analysis gives statistical edge when entering an options position. Greeks help manage risk associated with agregate positions instead of analyzing individual components after trade is under way. Theta is the most important Greek when selling option credit spreads. Theta is the amount of money you will receive into your account on a daily basis. It's nice to know what your banking everyday, but you are not getting money into your account without taking risk. Price risk will always be present and dependent on where the underlying price is versus the strikes sold to gain positive theta.
If you are not a chart reader, become a chart reader to gain edge against the Black Schoels Model. Technical Analysis is ideal for option credit spreads. For example, if Google is forming a double top and is overbought at 513 on January 16th I would consider selling a vertical call spread. at 520/530. I would sell the 520 February calls and buy the February 530 calls producing a credit. the goal is not to keep the trade on until expiration but to gain a profit of 5-10% well before expiration. In this example, Google traded down to about 440 on March 5th which happened to be an oversold or an extreme. This would be the time to buy back your vertical spread and take profits.
