Deposit and withdrawal is dependent on your broker. Ensure you go for a broker operating in India or accepting traders from India. Naturally, once a broker accepts you to sign up for an account, you should not have any problems with your transaction. If your broker has anything in particular against Indian customers, then you should not sign up with them from the word go, to be on the safer side. Do your background check well

Yes you can trade from India, if only you are careful enough in your selection of broker to deal with. There are brokers who do not accept traders from India, and there are trading regulations that also lie on the side of the Indian regulators. Do your research well and sign up with an acceptable broker to avoid withdrawal problems