ProStocks, a Sunlight Broking LLP venture ,introduces KeyStone Smart Back Office app – a very easy and convenient android based Back Office application You can access anytime from anywhere to check you Ledger Balance, Stock Status, Open Position, Bill Details on one touch of finger. ProStocks, a Sunlight Broking LLP venture, is a leading online brokerage firm allowing customer to invest and trade in stocks listed in Indian Stock Market. Customers can trade at BSE and NSE in segments including E