Sellinf od straddle at atm( n recording nifty spot)

i want to sell STRADDLE at ATM at specified time and Based on movement of Nifty in Points ( At the time of selling and user defined price want to book SL etc) pl help code.
Eg : Nifty straddle is Sold at 9:30 AM and NIFTY spot was 14200 at that time , the User enters 100 points that implies if the Nifty Moves up 100 Points Call will be squared off and put will be squared off when Nifty Spot is 14100.
Thanks