Give Them some time.
Adding New features in existing Infrastructure is not a cake walk.
It takes Time, BackTest, Error detection, backup, machine compatibility, platform independent, bug free working, availability, user interface, frames connectivity, data mining, network connectivity, http encryption over SSL ipv4 & ipv6 etc etc…
There are Already many bugs in existing systems Like, there server get down sometimes, order not get placed, Order modification fail, auto square off orders. Etc etc…
They should 1st make the existing Infrastructure bug free then only add new features.
It’s Just Like you want to Run bullet train on existing Indian railways Tracks. We all know the consequences.
Its unfair to expect overnight margin facility from zerodha. Overnight margin position may increase the risk of loosing huge money with any unwanted incident happening overnight and few inexperienced person are sufficient to put the stake of others in danger. So request zerodha not to include such a feature as the fee charged by them is not even comparable by what is charged by full time brokers. ( 20 by zerodha where icici reliance iifl gnp paribas usually charge 500+ for even a small trade)
One can always switch to a broker kyun ki aap chane ke daam me badaam nahi khareed sakte
For GTC i agree with the rest of the people that having it will be beneficial as it will put an end to daily placing of orders.