A credit spread where we sell an option at one strike and simultaneously buy an option at another. The way we use this in the SPX Spread Trader is to use a 5 pt spread between the 2 strike prices. So if we are selling a 2480 call we are purchasing a 2485 call at the same time. The beauty of this approach, By entering these two trades as a single credit spread order, there is only a single commission cost. The difference in prices between these two options provides a net credit to your account.