Options calculator

Hi I require someone who can help me build a calculator specific to options trading. I need someone who understands options and knows how to transpose a stock price into a theoretical value. My broker will not allow me to set up automated stops based on stock price so I need to set stops based on option price. So here is the typical scenario: I buy an option for $2.50 per share but the stock price is $50. I then want to take out an additional order that protects the upside. So I want to set a profit taker for the stock. (I have this formula) Now I want to set up a trailing stop for the trade, and this is where it gets difficult. This trailing stop needs to follow the stock. I need to be able to change the range of the stop so a variable setting will need to be part of the design. For a $50 stock I would allow a $2.00 trail behind the current share price. So if my profit taker is $60 then I want the trailing stop to be 5% of this value. Being able to calculate by entering the stock price and setting a percentage as the variable would also be helpful. For this job you must understand the options market to have a thorough understanding of this job. The calculator must be able to be integrated into my exiting trade management spreadsheet. It will become a functioning component of this system. To ensure you are contacted for this job please start you proposal with "TRADER" so I know you have read the brief and understand exactly what I am looking for. No time wasters!!!!!!!!! Thank you