some technical problem may be . if i sell a scrip and then want to cover (buy back ) in the same day .that may not be possible in edis
At TradeSmart we don't have any such restriction in case of E-DIS as long as the client has the sufficient margin. Though we can't comment about other brokers we feel it should be the practice adopted by most others too.
However, one scenario needs to be kept in mind. The client may not be allowed to cover (buy back) all shares because after the Peak Margin Reporting we are allowing only 80% sale proceeds for further trading so that means if the client has sold 100 qty and has 0 cash balance then eventually he will be allowed to buyback 80 qty. But this would be applicable for POA as well as non-POA both.