Do margin for CO changes from hour to hour>
When i tried to buy RCOM it showed 2.9k in margin calculator but when tried to buy 10 lots in Pi ,order got rejected due to lack of margin.
In Cover Order Margin Don’t Change on Hours basis.
Margin in Cover Order Depends on your Buy Price/ Sell Price and Your Stop-loss.
In Cover Order You will have to put the Stop-loss between the Specified range.
Range you will see while placing the Orders.
I am using kite and i think it’s not changing . just check borderline available margin.
Also in case of CO/BO check the market depth always as it may cause your trade in multiple bunches to eat your intraday profit