The main participants in this market are the larger international banks. Financial centers around the world function as anchors of trading between a wide range of multiple types of buyers and sellers around the clock, with the exception of weekends. Since currencies are always traded in pairs, the foreign exchange market does not set a currency's absolute value but rather determines its relative value by setting the market price of one currency if paid for with another. Ex: US$1 is worth X CAD, or CHF, or JPY, etc.
Being the largest, most active financial market on the globe, it is also the world's most liquid market, meaning it is easy for traders to enter into, as well as exit trades, and for the most liquid pairs, they can do so at a very low cost (even less than a single pip!). This also means that the Forex market is very volatile, creating many opportunities for traders to make a profit on both the positive and negative movements of currency pairs.
By contrast, if you just traded 20 EUR, a loss would not significantly affect your account balance. It would provide you with the opportunity to learn from your experience and plan your next trade more effectively. With this in mind, limiting the capital you are prepared to risk to 5% of your account balance (or lower) will put you in a better position to continue trading Forex (and improving your technique) over the long term.
By contrast, the Australian Dollar, the New Zealand Dollar and the Japanese Yen tend to be more active between 00:00 and 08:00 GMT. As a trader, this means you can trade whenever it suits you - if you work during the day, there will be currencies available to trade before or after work. If you have children but are at home during the day, you can simply choose a different currency. In the Forex market, you can trade 24 hours a day, 5 days a week.
The practice of taking on excessive risk does not equal excessive returns. Almost all traders who risk large amounts of capital on single trades will eventually lose in the long run. A common rule is that a trader should risk (in terms of the difference between entry and stop price) no more than 1% of capital on any single trade. Professional traders will often risk far less than 1% of capital.
Another element of the service provided is the margin requirements and level of leverage available. While there is no need to choose the highest level of available leverage when you start trading Forex, simply knowing that a broker offers the highest level of leverage approved by their regulator means that, as your experience grows, you can start to increase your leverage according to your preferences.