still remember (a year ago i guess) in a single trade since system hanged, called urgently the broker to close my position which the guy on the other end seems new and he can’t able to close the whole lot immediately and he took some 15 minutes to close ( for around 200 lots of nifty ) and I end up loss of 48k because of this. Tried arguing with the brokerage house with all failed transaction made by them in vain.