The Bull Call Spread is a simple option strategy and is structured by a long call option and a short call option with higher strike and same expiry. The risk of the buyer of the Bull Call Spread is limited to the difference between the two option premiums. The potential for profit is limited to the difference between the strike prices less the premium paid and transaction costs. The maximum profit could be received only at the expiry.
The Bull Call Spread strategy is most suitable in the following cases: