You may refer to this link If I have transferred funds then within how much time will I be able to trade?
You will receive instantaneous credit if you have transferred through Net Banking or UPI. In case of NEFT/RTGS/IMPS, it can take anywhere between 20 mins to 2 hours. If you have deposited a cheque, it would take around 3-4 business days for the margin to reflect in your account.