Follow the market trend for few days and then select stocks you want to purchase. Once you prepare your portfolio of stocks, try virtual trading for practicing or you can start with small investment, for example 1, 10, or 20 shares. To buy the stock, place your bid through your share trading account. The guidelines of the Reserve Bank of India (RBI) mandate NRIs to open a trading account with a designated institution authorized by the RBI. They must avail either a Non-Resident Ordinary (NRO) or Non-Resident External (NRE) account to route the various investments. Once the shares are bought, they are deposited into the bank demat account of the investor and as soon as it is sold, the result gets reflected in the online demat account. You deal in electronic shares and for starting stock trading in India, you need to have a demat account done.