Comment on MCX - Profit/Loss for every 1 Rs change
After buying a contract, if the contract value goes up, you make a gain. So post MTM (mark to market), Rs.200 gets credited to your account. You’ll have to worry when margins start getting depleted on account of the commodity price moving down, that’s when you’ll have to bring in additional funds. As Nithin’s mentioned, best to keep 5-10% additional margins than what’s required at the time of entering the position.