Box is similar to Reversal, but the position in the underlier is replaced with a synthetic short made of a short call and a long put of the same strike.
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The screenshot shows the following portfolio:
European put struck at 9.000 with expiry in 30 days
European call struck at 9.000 with expiry in 30 days
European put struck at 11.000 with expiry in 30 days
European call struck at 11.000 with expiry in 30 days
This is an excerpt from iOptioneer option trading reference application. In order to build the real-time dynamic strategy graph and run simulations you will need to download the application from App Store.