Trading leverage or leveraged trading allows you to control much larger amounts in a trade, with a minimal deposit in your account. Leveraged trading is also known as margin trading. You can open up a small account with a brokerage, and then essentially borrow money from the broker to open a large position. This allows traders to magnify the amount of profits earned.
Once you begin trading with a certain FX broker, you may want to modify the leverage available to you. This depends on the broker. With Admiral Markets you can use an industry standardised procedure that includes authenticating to the Trader's Room, selecting your account, and changing the leverage available. This action takes immediate effect, so be careful if you have open positions when you attempt to reduce your leverage.
Between 2003 and the end of 2004, the AUD/USD currency pair offered a positive yield spread of 2.5%. Although this may seem very small, the return would become 25% with the use of 10:1 leverage. During that same time, the Australian dollar also rallied from 56 cents to close at 80 cents against the U.S. dollar, which represented a 42% appreciation in the currency pair. This means that if you were in this trade – and many hedge funds at the time were – you would have not only earned the positive yield, but you would have also seen tremendous capital gains in your underlying investment. 
From this we can see that the Forex leverage ratio strongly depends on the strategy that is going to be used. To give you a better overview, scalpers and breakout traders try to use as high a leverage as possible, as they usually look for quick trades. Positional traders often trade with low leverage or none at all. A desired leverage for a positional trader usually starts at 5:1 and goes up to about 20:1.

All forex trades involve two currencies because you're betting on the value of a currency against another. Think of EUR/USD, the most-traded currency pair in the world. EUR, the first currency in the pair, is the base, and USD, the second, is the counter. When you see a price quoted on your platform, that price is how much one euro is worth in US dollars. You always see two prices because one is the buy price and one is the sell. The difference between the two is the spread. When you click buy or sell, you are buying or selling the first currency in the pair.

GBPJPY is the most confusing one in all the JPY-related pairs. It seems that very hard for it to rise up to last top on weekly chart. It closed with a weak warning bearish weekly signal last week. On this daily chart, it could drop down more after breaking through the blue short-term daily trend line. And the 3rd wave could drop down to next support which is also...