A foreign exchange market is a 24-hour over-the-counter (OTC) and dealers’ market, meaning that transactions are completed between two participants via telecommunications technology. The currency markets are also further divided into spot markets—which are for two-day settlements—and the forward, swap, interbank futures, and options markets. London, New York, and Tokyo dominate foreign exchange trading. The currency markets are the largest and most liquid of all the financial markets; the triennial figures from the Bank for International Settlements (BIS) put daily global turnover in the foreign exchange markets in trillions of dollars. It is sobering to consider that in the early 21st century an annual world trade’s foreign exchange is traded in just less than every five days on the currency markets, although the widespread use of hedging and exchanges into and out of vehicle currencies—as a more liquid medium of exchange—means that such measures of financial activity can be exaggerated.
In the context of the foreign exchange market, traders liquidate their positions in various currencies to take up positions in safe-haven currencies, such as the US dollar. Sometimes, the choice of a safe haven currency is more of a choice based on prevailing sentiments rather than one of economic statistics. An example would be the financial crisis of 2008. The value of equities across the world fell while the US dollar strengthened (see Fig.1). This happened despite the strong focus of the crisis in the US.
The logistics of forex day trading are almost identical to every other market. However, there is one crucial difference worth highlighting. When you’re day trading in forex you’re buying a currency, while selling another at the same time. Hence that is why the currencies are marketed in pairs. So, the exchange rate pricing you see from your forex trading account represents the purchase price between the two currencies.
More specifically, the spot market is where currencies are bought and sold according to the current price. That price, determined by supply and demand, is a reflection of many things, including current interest rates, economic performance, sentiment towards ongoing political situations (both locally and internationally), as well as the perception of the future performance of one currency against another. When a deal is finalized, this is known as a "spot deal". It is a bilateral transaction by which one party delivers an agreed-upon currency amount to the counter party and receives a specified amount of another currency at the agreed-upon exchange rate value. After a position is closed, the settlement is in cash. Although the spot market is commonly known as one that deals with transactions in the present (rather than the future), these trades actually take two days for settlement.