All currency trading is done in pairs. Unlike the stock market, where you can buy or sell a single stock, you have to buy one currency and sell another currency in the forex market. Next, nearly all currencies are priced out to the fourth decimal point. A pip or percentage in point is the smallest increment of trade.
The International currency market involves participants from around the world. They buy and sell different currencies. Currency trading participants comprise banks, corporations, central banks (like RBI in India), investment management firms, hedge funds, retail forex brokers, and investors like you. Forex trading is a legitimate way to make a profit.