economi in the world

EUR/USD
In this example euro is the base currency and thus the "basis" for the buy/sell.

If you believe that the US economy will continue to weaken and this will hurt the US dollar, you would execute a BUY EUR/USD order. By doing so you have bought euros in the expectation that they will appreciate versus the US dollar. If you believe that the US economy is strong and the euro will weaken against the US dollar you would execute a SELL EUR/USD order. By doing so you have sold euros in the expectation that they will depreciate versus the US dollar.

USD/JPY
In this example the US dollar is the base currency and thus the "basis" for the buy/sell.

If you think that the Japanese government is going to weaken the yen in order to help its export industry, you would execute a BUY USD/JPY order. By doing so you have bought U.S dollars in the expectation that they will appreciate versus the Japanese yen. If you believe that Japanese investors are pulling money out of U.S. financial markets and repatriating funds back to Japan, and this will hurt the US dollar, you would execute a SELL USD/JPY order. By doing so you have sold U.S dollars in the expectation that they will depreciate against the Japanese yen.

GBP/USD
In this example the GBP is the base currency and thus the "basis" for the buy/sell.

If you think the British economy will continue to be the leading economy among the G7 nations in terms of growth, thus buying the pound, you would execute a BUY GBP/USD order. By doing so you have bought pounds in the expectation that they will appreciate versus the US dollar. If you believe the British are going to adopt the euro and this will weaken pounds as they devalue their currency in anticipation of the merge, you would execute a SELL GBP/USD order. By doing so you have sold pounds in the expectation that they will depreciate against the US dollar.

USD/CHF
In this example the USD is the base currency and thus the "basis" for the buy/sell.

If you think the US dollar is undervalued, you would execute a BUY USD/CHF order. By doing so you have bought US dollars in the expectation that they will appreciate versus the Swiss Franc. If you believe that due to instability in the Middle East and in U.S. financial markets the dollar will continue to weaken, you would execute a SELL USD/CHF order. By doing so you have sold US dollars in the expectation that they will depreciate against the Swiss franc.

Buying/Selling
First, you should determine whether you want to buy or sell.
If you want to buy (which actually means buy the base currency and sell the quote currency), you want the base currency to rise in value and then you would sell it back at a higher price. In trader's talk, this is called "going long" or taking a "long position". Just remember: Long = Buy = Ask.
If you want to sell (which actually means sell the base currency and buy the quote currency), you want the base currency to fall in value and then you would buy it back at a lower price. This is called "going short" or taking a "short position". Short = Sell = Bid.

» How to calculate Profit and Loss

Bid/Ask Spread
All Forex quotes include a two-way price, the bid and ask. The bid is always lower than the ask price.
The bid is the price in which the dealer is willing to buy the base currency in exchange for the quote currency. This means the bid is the price in which you the trader will sell.
The ask is the price at which the dealer will sell the base currency in exchange for the quote currency. This means the ask is the price in which you the trader will buy.
The difference between the bid and the ask price is popularly know as the Spread.

Let's take a look at an example taken from a trading software:



On this EUR/USD quote, the bid price is 1.2293 and the ask price is 1.2296. Look at how this broker makes it so easy for you to trade away your money. If you want to sell EUR, you click "Sell" and you will sell Euros at 1.2293. If you want to buy EUR, you click "Buy" and you will buy Euros at 1.2296.