When you are buying options, cover order doesn't really give you any margin benefits.. I know the limitation of using cover orders, while trading options in the sense, you don't get great flexibility in placing the trigger as the range is small.. We are finding a way out for this and will keep you all updated..
Thanks for consideration, Please also consider to increase cover order benefits from 20 % to 50 %, you can check in your system how many trader (%) using this facility, so exactly you know how much benefit you can allow. I think cover order is good for to take trade for very short term and its very risky than positional trade. Its depending on your technic that how many trades you can take in a day and your profit should be more than your loss.
Do have any extra facility for traders who want to do high volume (High No of Trade) intraday basis. If yes, than please send me PM. I want refer to my some friends. Thanks