just carry on the trades

currently we are carrying some index options of nifty for december series,nifty 4900 put and 5300 call and we have sold 4800 put and 5100 call.we have receieved total premium of 55 on these trades .if you have a good portfolio you can earn handsomely by using the trades where for selling calls and puts only margin is required ,once u sell these calls u receieve premium from which u can buy the other calls and puts.