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).
And so we come to the question of how to predict Forex movement? Fortunately, economists created the standard economic calendar, where they make daily predictions around various economic values based upon recent history. It generally contains the following data: date, time, currency, data released, actual, forecast, and previous. There are certain economic figures, which when announced, nearly always have a heavy impact on the movement of the FX market.

Hi everyone, AUDUSD was strong bearish in 2018 and we were selling AUDUSD right from the top when it was at the 0.81. The bearish fall was very nice and we enjoyed that fall very well. Now its time to look for it to go back up and hit the 0.81 area again. . So we have enough price action on lower time frame for reversal. Which means we should look for long on...
At the end of 1913, nearly half of the world's foreign exchange was conducted using the pound sterling.[24] The number of foreign banks operating within the boundaries of London increased from 3 in 1860, to 71 in 1913. In 1902, there were just two London foreign exchange brokers.[25] At the start of the 20th century, trades in currencies was most active in Paris, New York City and Berlin; Britain remained largely uninvolved until 1914. Between 1919 and 1922, the number of foreign exchange brokers in London increased to 17; and in 1924, there were 40 firms operating for the purposes of exchange.[26]
To find out how many euros it costs to buy one U.S. dollar, flip the pair to USD/EUR. To find out this rate, divide 1 by 1.3635 (or whatever the current rate is). The result is 0.7334. It costs 0.7334 euros to buy one USD based on the current market price. The price of the currency pair constantly fluctuates, as transactions occur around the globe, 24-hours a day during the week.  

The simplest answer is that the forex is open for trading all the time, but that the specific hours it opens and closes at any given location depending upon where you are in the world. The base reference time for all opening and closing times worldwide is Greenwich Mean Time, commonly abbreviated GMT. Many websites devoted to clarifying forex business hours describe the opening and closing times with three or four significant examples, usually

For closing positions, setting a take profit or stop loss order on an existing position you will also need to provide us with your ticket number. Then all you will need to do is request for a two-way quote on a particular currency pair and specify the transaction size (e.g. “I’d like a Dollar Japanese Yen quote for 10 lots.”). Please remember if password authorization fails, or you do not wish to undergo this process, we will not be able to carry out your instructions.
Understanding the above concepts will help you grasp what's happening when you see a forex pair rising or falling on a chart. If you do the math on the difference in pips between two price points, it will also help you see the profit potential available from such moves. For more on starting out in forex trading, see Minimum Capital Required to Start Day Trading Forex and How Much Money Can I Make Forex Day Trading? Both these articles provide more examples of how profit is realized in the forex market, as well as introducing new concepts, such as leverage.
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.[80]
The need to exchange currencies is the primary reason why the forex market is the largest, most liquid financial market in the world. It dwarfs other markets in size, even the stock market, with an average traded value of around U.S. $2,000 billion per day. (The total volume changes all the time, but as of August 2012, the Bank for International Settlements (BIS) reported that the forex market traded in excess of U.S. $4.9 trillion per day.)