These guys cancelled my order when I got my target price order id 170203000507580 BANKNIFTY17FEBFUT on 3-2-17
and then auto squared off order id 170203000541958 when I made a loss of around 1000-1500Rs.
(as per my 1st call to the support team the lady denied cancelling the order from their end and said I cancelled it.)
later accepted and said they can cancel order at 3:19 PM and square off till 3:33 PM.
Means you are no trade window for these 4 min. and you may loose lakhs in case.
PLEASE AVOID ZERODHA. They will make money from you in wrong means.