Anyone know any sities name from were I can download a good options profit or loss calculator which can be used for multiple strategies. Do let me know?

General
2

These should help you out.

http://www.samoasky.com/protfolio/

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https://zerodha.com/margin-calculator/SPAN/

Check this too.

4

Here’s an Options Strategy builder with payoff graphs by Zerodha’s competitor RKSV:

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Thanks for this link. It was helpful