Forex rates are special in that they are expressed as "two tier" rates in order to acknowledge the twin nature of foreign exchange transactions. For instance, USD/JPY at 160/15 means a trader is prepared to purchase Japanese Yen at 160 and sell at 160.15. If the trader finds a buyer at this price, then a 15 pip "spread", the difference between the buying and selling price, will have been made on the deal.
The spread between currencies hinges on market conditions and how traders around the globe believe each currency is going to perform and the likely level of volatility in price.
Unlike other exchanges, such as the London Stock Exchange, the Forex market is truly global, no one state or government can regulate the Forex unilaterally. However, this is not to say those participating in the transactions are not regulated.
Guys, if you are interested in Forex trading but know absolutely nothing about it, there are a lot of things to consider. For example, I recommend you find as many websites (articles, tips, guides etc) as you can and study it. Stay informed and you will be the best expert in this field. By the way, here is a good article http://change-wm.com/2018/03/16/7-best-forex-trading-books-for-beginners/
You know, trading with closely connected with foreign exchange is very risky. You should think about policy, economy, internal situation etc. People usually can't manage it without additional help. I usually get this help on https://topbrokers.com/forex-brokers
I hope you enjoy the learning experience. The basic idea of Foreign exchange or Forex is simply exchanging one currency for the next like you would do in a foreign country. I am assuming you knew this and what you are really asking is, what is margin FX trading as done within the interbank mark Starting at everfx