When a trader opens a position at AvaTrade, he is not charged any other commissions beside the spread. The spread is the difference between the buy and sell price which is counted in pips – the fourth digit after the dot. For example if the buy price of EURUSD is 1.1123 and the sell price is 1.1120, then the spread is 3 pips. The spread charged for a position opened by a trader is the spread multiplied by the size of the position.

The foreign exchange market is extremely active all day long with price quotes constantly changing. It is the only market that truly operates 24 hours a day and five days a week. Currencies are traded on the international interbank market in Zurich, Hong Kong, New York, Tokyo, Frankfurt, London, Sydney and Paris. This means that across almost every time zone the market is active - when the working day ends in one part of the world, in the other hemisphere, at that very moment, banks have already opened their doors and trading continues.
When buying, the spread always reflects the price for buying the first currency of the forex pair with the second. So an offer price of 1.3000 for EUR/USD means that it will cost you $1.30 to buy €1. You would buy if you think that the price of the euro against the dollar is going to rise, that is, if you think you will later be able to sell your €1 for more than $1.30.
The Forex (FOReign EXchange) market appeared at the end of the 1970s after many countries decided to unpeg their currency value from that of the US dollar or gold. This led to the formation of an international market on which currency could be exchanged and traded freely. Today, Forex is the largest financial market in the world. It doesn’t matter where you live or even where you are right now; as long as you have access to the Internet, a trading terminal (a special program for trading Forex), and an account with a Forex broker, all the instruments and opportunities of Forex are available to you.
The world then decided to have fixed exchange rates that resulted in the U.S. dollar being the primary reserve currency and that it would be the only currency backed by gold, this is known as the ‘Bretton Woods System’ and it happened in 1944 (I know you super excited to know that). In 1971 the U.S. declared that it would no longer exchange gold for U.S. dollars that were held in foreign reserves, this marked the end of the Bretton Woods System.
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Leveraged trading in foreign currency contracts or other off-exchange products on margin carries a high level of risk and may not be suitable for everyone. We advise you to carefully consider whether trading is appropriate for you in light of your personal circumstances. You may lose more than you invest (except for OANDA Europe Ltd customers who have negative balance protection). Information on this website is general in nature. We recommend that you seek independent financial advice and ensure you fully understand the risks involved before trading. Trading through an online platform carries additional risks. Refer to our legal section here.
Many currency pairs will move about 50 to 100 pips (sometimes more or less depending on overall market conditions) a day. A pip (an acronym for Point in Percentage) is the name used to indicate the fourth decimal place in a currency pair, or the second decimal place when JPY is in the pair. When the price of the EUR/USD moves from 1.3600 to 1.3650, that's a 50 pip move; if you bought the pair at 1.3600 and sold it at 1.3650 you'd make a 50-pip profit.
Unlike a stock market, the foreign exchange market is divided into levels of access. At the top is the interbank foreign exchange market, which is made up of the largest commercial banks and securities dealers. Within the interbank market, spreads, which are the difference between the bid and ask prices, are razor sharp and not known to players outside the inner circle. The difference between the bid and ask prices widens (for example from 0 to 1 pip to 1–2 pips for currencies such as the EUR) as you go down the levels of access. This is due to volume. If a trader can guarantee large numbers of transactions for large amounts, they can demand a smaller difference between the bid and ask price, which is referred to as a better spread. The levels of access that make up the foreign exchange market are determined by the size of the "line" (the amount of money with which they are trading). The top-tier interbank market accounts for 51% of all transactions.[63] From there, smaller banks, followed by large multi-national corporations (which need to hedge risk and pay employees in different countries), large hedge funds, and even some of the retail market makers. According to Galati and Melvin, “Pension funds, insurance companies, mutual funds, and other institutional investors have played an increasingly important role in financial markets in general, and in FX markets in particular, since the early 2000s.” (2004) In addition, he notes, “Hedge funds have grown markedly over the 2001–2004 period in terms of both number and overall size”.[64] Central banks also participate in the foreign exchange market to align currencies to their economic needs.
Once you have picked a market, you need to know the current price it is trading at, which you can do by bringing up an order ticket in the platform. All forex is quoted in terms of one currency versus another. Each currency pair has a ‘base’ currency and a ‘quote’ currency. The base currency is the currency on the left of the currency pair and the quote currency is on the right. Put simply, when trading foreign currencies, you would:

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.
In forex, currencies are quoted in pairs. Let’s take the most popular currency pair as an example, EUR/USD. The first currency (Euro in this case) is called the base currency and the second (USD) is called the quote currency. When you trade a pair you are speculating on whether the base currency (EUR) will strengthen or weaken against the quote currency (USD).

There are three primary forex markets — spot, forwards, and futures markets. The spot market is by far the most popular, and consists of the real asset that both the futures and forwards markets are based on. Forex market participants range from international banks to enterprises that deal in various countries who are looking to hedge risk on the exchange rates they use for dealing in multiple currencies.
Starting with $500 gives some flexibility in how you can trade; $100 doesn't. If you want to day trade forex, start with at least $500. No matter what balance you start with, limit risk to 1% of your account balance on each trade. Alter the above scenarios to help determine what your position size should be based on the stop loss level you use and what type of lot (micro, mini or standard) you're trading.
Just like stocks, you can trade currency based on what you think its value is (or where it's headed). But the big difference with forex is that you can trade up or down just as easily. If you think a currency will increase in value, you can buy it. If you think it will decrease, you can sell it. With a market this large, finding a buyer when you're selling and a seller when you're buying is much easier than in in other markets. Maybe you hear on the news that China is devaluing its currency to draw more foreign business into its country. If you think that trend will continue, you could make a forex trade by selling the Chinese currency against another currency, say, the US dollar. The more the Chinese currency devalues against the US dollar, the higher your profits. If the Chinese currency increases in value while you have your sell position open, then your losses increase and you want to get out of the trade.