Nice job you two !! (as usual might I say).I have several questions:1) I suspect your box contract price to be linked to the area of the box but what is the cheaper between those three contracts (S1,S2)*(T1,T2) vs (2S1,2S2)*(T1/2,T2/2) vs (S1/2,S2/2)*(2*T1,2*T2) ?2) I think there is closed form formula for linear barrier option so would it be possible to price a kind of "general polygon" box option contract ? (let's say for practical use that I don't have the same uncertainty during all the option life)3) How could you edge that ? Static edge with a bunch of one touches ?