Dear Anil,
Your strategy will result in profit when Nifty moves down. So, hold Nifty 4100 put with SL= 50 max. and square off MiniNifty whenever you get an oppourtunity. This strategy is good in bearish market not in sideways market.
Buy calls and puts are per strategy stated below:
If Nifty opens with gap up and remain above 20pts till 10:30AM - 10:45 AM buy calls at S1 with SL 20-30% from your buy price. Book profit if your target is achieved or buy puts at R1 around 3:00 PM-3:15 PM and hold call with a trailing SL of say 10%.
If Nifty opens with gap down and remain below 20pts till 10:30AM - 10:45 AM buy puts at R1 with SL 20-30% from your buy price. Book profit if your target is achieved or buy calls at R1 around 3:00 PM-3:15 PM and and hold put with a trailing SL of say 10%.
Vary calls and puts nos. according to the trend.
Regards