Forex trading always involves selling one currency in order to buy another, which is why it is quoted in pairs – the price of a forex pair is how much one unit of the base currency is worth in the quote currency. ... Less frequently traded, these often feature major currencies against each other instead of the US dollar.
Forex trading is heavily monitored, and many Forex brokers are regulated by more than one authority. This demonstrates that Forex is one of the safest markets to trade, although this only applies to regulated brokers. Trader's also have the ability to trade risk-free with a demo trading account.