Whether you are a beginner trader or a pro, it is best to trade with what you see and not what you think. For example, you might think that the US dollar is overvalued and has been overvalued for too long. Naturally, you will want to short and you might be right eventually. But if the price is moving up, it does not matter what you think. In fact, it doesn't matter what anybody thinks – the price is moving up and you should be trading with the trend.
Forex banks, ECNs, and prime brokers offer NDF contracts, which are derivatives that have no real deliver-ability. NDFs are popular for currencies with restrictions such as the Argentinian peso. In fact, a forex hedger can only hedge such risks with NDFs, as currencies such as the Argentinian peso cannot be traded on open markets like major currencies.
Currencies are traded against one another in pairs. Each currency pair thus constitutes an individual trading product and is traditionally noted XXXYYY or XXX/YYY, where XXX and YYY are the ISO 4217 international three-letter code of the currencies involved. The first currency (XXX) is the base currency that is quoted relative to the second currency (YYY), called the counter currency (or quote currency). For instance, the quotation EURUSD (EUR/USD) 1.5465 is the price of the Euro expressed in US dollars, meaning 1 euro = 1.5465 dollars. The market convention is to quote most exchange rates against the USD with the US dollar as the base currency (e.g. USDJPY, USDCAD, USDCHF). The exceptions are the British pound (GBP), Australian dollar (AUD), the New Zealand dollar (NZD) and the euro (EUR) where the USD is the counter currency (e.g. GBPUSD, AUDUSD, NZDUSD, EURUSD).
An investor can profit from the difference between two interest rates in two different economies by buying the currency with the higher interest rate and shorting the currency with the lower interest rate. Prior to the 2008 financial crisis, it was very common to short the Japanese yen (JPY) and buy British pounds (GBP) because the interest rate differential was very large. This strategy is sometimes referred to as a "carry trade."
Leverage: Leverage is capital provided by a Forex broker to bolster their client's trading volume. For example, if you use a 1:10 rate of leverage and have $1,000 in your trading account, you can trade $10,000 worth of a currency pair. If the trade is successful, leverage will maximise your profits by a factor of 10. However, please note that leverage also multiplies your losses to the same degree, so it should be used with caution. If your account balance falls below $0, you may trigger a broker's negative balance protection settings (if trading with an ESMA regulated broker), which will result in the trade being closed. Fortunately, this means that your balance cannot move below $0, so you will not be in debt to the broker.
In particular, you should look for a Forex broker that has a major presence in your country or, at a minimum, offers phone and email support in your language. A broker with an efficient customer enquiry and complaints procedure will ensure that if an enquiry is filed by a Forex trader and cannot be resolved within a few hours, it is immediately forwarded to the customer support desk or compliance department.