Forex trading is all about buying currency. You buy as much as you can of a currency when its value in relation to another is low and wait for the situation to change. When the value of the currency you bought goes up again you sell. At least you sell when you think it is going to stop going up. If you wait too long it may go down again and you are left waiting for another rise. This is dead money. You want to keep moving the money to earn.
Because of the turning globe there are always a number of exchanges open, so trading continues around the clock. This works in a kind of relay because what has been happening in the other markets while one is closed will have on their days trading when they open. This effect varies and can have a positive and negative effect on the market. It is up to the traders and brokers to watch what is happening and take advantage of favourable conditions when they occur.
The foreign exchange market develops when two countries having different currencies trade goods. They must of course pay each other. This could be done using either their own or some other agreed currency. The American dollar is a popular choice for international trading.
Other than ordinary trade, i.e. trading goods, many people trade only currency. Much of this is done through the banks. The banks rum many of the currency exchanges and people going to foreign countries buy their currency here making it their first and often only brush with foreign currency trading.
A good way to learn the trade is to buy one of the trading software programs. They are similar to games and quite easy to learn. They do not substitute for the training that a licensed broker gets, but they will give some small indication of what the forex market is all about. Forex system trading? Well, everyone in the business... actually that is not strictly true. Many people in the business have a forex system. But, they are a bit like the systems that you hear about casinos. Some good some bad. You might get lucky with one. I'll say no more on that.
If you decide to become involved in forex as an individual you can not do so alone. You must go through a broker or some financial organisation. If your investment is small it may be difficult to get anyone to take an interest. Brokers deal in millions every day. An individual is known as a spectator because of the relatively small amounts invested. (a technical term)
You should do your background checking and learn all you can about forex before actually investing any money. The markets are heavily regulated and there are many laws protecting investors but there are also con men out there just waiting for an unwary investor to come their way. They are online and off. First make sure that they are qualified and licensed to operate in your country. If in doubt check it out. Talk to someone you know or a friend of a friend before taking the plunge.
If you can spare the cash to invest in fx it can be an exciting and interesting pastime. But don't blow your pension on it. Values fall as well as rise.