hi zerodha @ShubhS9
i have observed this second time that i received a margin call sms email in below condition
a. i have shorted weekly bnf CE which is in minor profit and margin is still available in account
b. i place a limit buy order on this bnf CE and the order is placed no problem
c. after an hour i receive a margin call sms email while my short ce position is still in small profit and OTM
i have seen that when i had only a short ce position i didnt get any margin call even if the spot moved close to my CE level but the moment i place a cover buy order for my short ce position i get margin calls!
why am i getting margin call? its not that the index has gone up wildly to make my short CE position in negative and short of margin? VIX had already gone up before i had placed my cover buy order and margin was available so even volatility is not a problem
the moment i cancel my limit buy order against my short open CE position margin is reduced back to normal level!