Originally posted by: Mark R
	
	
		
		
			Originally posted by: Mr Pickles
Can someone explain how people make money off of exchanging currencies? Not the e-currency exchange thing, I want to know how people simply trade made and make money off of the return, and how it could actually be profitable for someone like me?
		
		
	 
Two ways:
1. You change 1 currency (e.g. USD) into a different currency (e.g. GB pounds) when the exchange rate is low (e.g. $1.5 = £1). Wait until it goes up (e.g. $2 = £1), and then change back, keeping the profit.
2. You borrow money in 1 currency (e.g. Japan Yen) where interest rates are very low (Japan base rate has been 0.5% for years). Change the money for a currency with a high interest rate (e.g. NZ $ where interest rates have been 8.5%), and invest the money in a high yield account. You then keep the difference in interest payments between your loan and the return on investment. 
Number 2 is known as "carry trade" and over the last 5-10 years, it's been amazingly popular between the Asian currencies - as Japan has had virtually 0 interest rates, and Australia/NZ have had sky high rates - however, people have played this against the USD and GBP as well.
Because of the ability to earn different rates of interest in different currencies, this makes interest rates an important factor influencing exchange rates - a lot of currency traders will watch the central banks and economies carefully, and make their investments based upon what they think will happen. The fact that Japan has had virtually 0 interest rates for a decade has seriously weakened the Yen - people borrow Yen, then have to change it for other currencies, pushing the exchange rate up. Meanwhile, no one wants to convert money to Yen to invest, because the return they get is virtually 0.
Most currency brokers offer ready made derivatives that contain a built in loan and investment in your chosen currencies. You simply "buy" "JPY-EUR", and the product offered contains a built in loan in EUR, and savings in JPY, and the appropriate currency conversion. You can then buy and sell as required, depending on how you want to bet. The fact that you get a built in loan, means you can bet big - deposit $10k in your account as security, and you could play with converting $1 million worth of whatever currency you want (not that this is a good idea).
By all means have a play - most brokers have free online trading demo that you can play with real price data, but fake money. (I found the demo from 
Oanda.com the best, it's unlimited duration and real time data too). But be aware, that it's damn near impossible to make money, and unless you know basic ground rules about risk manaement in gambling then you will get absolutely killed. Because the derivatives offered to you contain built in loans, you are betting with borrowed money - and you can easily lose a lot more money than your original security deposit - and unlike gambling debts, these debts are fully collectible.
No, I don't trade currencies. Thankfully, I found out using a demo that I sucked.