No problem, yes it must be the beers, I was going insane for a while Then we are on the same track now then. I think my calculation in the first post reflects the profit and loss at the 2 strikes then (*100).
Expiry Price 105: -$75 <-- Initial Cash flow (no value at expiry) Expiry Price 110: $425 <-- 105 strike worth (110-105) $5 each, so $500-75; You referenced Delta in your PnL, which is not appropriate. This is at Expiration, so no Greeks exist (as IV has expired). The code snip I sent should not have my alcohol influence as for that I remembered to reverse the strike/price for the short Calls.
Yes okay, I didn't know that it was wrong to calculate with the greeks(delta) at expiration. So, we only calculate from strike 105 to 110 (strike/underlying) price at expiration even that the underlying was at 100 when we entered the 105 strike? Yes it is easy to be confused sometimes of up/down/call/put/buy/sell.
That is great, thanks! Then I have understood how to calculate this correctly. Yes alcohol has its own mind sometimes