A long call butterfly is entered when a trader thinks a stock will not rise or fall by much between trade initiation and expiration. When using calls, the trade is constructed by buying an in-the-money call, selling two at-the-money calls and buying an out-of-the-money call. The trade is entered for a net debit meaning the trader pays to enter the trade. This debit is also the maximum possible loss.
The maximum profit is calculated as the difference between the short and long calls less the premium that you paid for the spread.
