These currency pairs, in addition to a variety of other combinations, account for over 95% of all speculative trading in the forex market. However, you will probably have noticed the US dollar is prevalent in the major currency pairings. This is because it’s the world’s leading reserve currency, playing a part in approximately 88% of currency trades.
Trading currencies is the act of making predictions based on minuscule variations in the global economy and buying and selling accordingly. The exchange rate between two currencies is the rate at which one currency will be exchanged for another. Forex traders use available data to analyze currencies and countries like you would companies, thereby using economic forecasts to gain an idea of the currency's true value.
In a short setup, the market needs to be trading below the 21 EMA first. As the market retraces back to the moving average, day traders may be anticipating a turn lower from it. Therefore, if a seller bar forms on the moving average it could be a sign of further selling momentum. However, a stop loss is always used to minimise losses in case the market turns the other way.
However, since the Forex market is a global market, it means there is always a part of the world that is awake and conducting business, and during these hours their currencies tend to experience the most movement. For example, currency pairs involving the US dollar experience the most movement during US business hours (16:00 to 24:00 GMT), while the Euro, Pound, Swiss Franc and other European currencies experience the most movement during European business hours, (8:00 and 16:00 GMT).
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.