There is no minimum deposit or minimum balance required to open an OANDA account for forex trading. You only need make sure to have enough equity to open positions of sizes you are comfortable with including margin requirements. You can calculate the margin required when you open a position in a currency pair using the OANDA Forex Margin Calculator .
It should be noted that there is no central marketplace for the Forex market; trading is instead said to be conducted ‘over the counter’; it’s not like stocks where there is a central marketplace with all orders processed like the NYSE. Forex is a product quoted by all the major banks, and not all banks will have the exact same price. Now, the broker platforms take all theses feeds from the different banks and the quotes we see from our broker are an approximate average of them. It’s the broker who is effectively transacting the trade and taking the other side of it…they ‘make the market’ for you. When you buy a currency pair…your broker is selling it to you, not ‘another trader’.
One unique aspect of this international market is that there is no central marketplace for foreign exchange. Rather, currency trading is conducted electronically over-the-counter (OTC), which means that all transactions occur via computer networks between traders around the world, rather than on one centralized exchange. The market is open 24 hours a day, five and a half days a week, and currencies are traded worldwide in the major financial centers of London, New York, Tokyo, Zurich, Frankfurt, Hong Kong, Singapore, Paris and Sydney - across almost every time zone. This means that when the trading day in the U.S. ends, the forex market begins anew in Tokyo and Hong Kong. As such, the forex market can be extremely active any time of the day, with price quotes changing constantly.