The key to creating a successful carry trade strategy is not simply to pair up the currency with the highest interest rate against a currency with the lowest rate. Rather, far more important than the absolute spread itself is the direction of the spread. In order for carry trades to work best, you need to be long in a currency with an interest rate that is in the process of expanding against a currency with a stationary or contracting interest rate. This dynamic can be true if the central bank of the country that you are long in is looking to raise interest rates or if the central bank of the country that you are short in is looking to lower interest rates.
Currency values never remain stationary, and it is this dynamic that gave birth to one of the most popular trading strategies of all time, the carry trade. Carry traders hope to earn not only the interest rate differential between the two currencies (discussed above), but also look for their positions to appreciate in value. There have been plenty of opportunities for big profits in the past. Let’s take a look at some historical examples. 
To illustrate further, let's look at a typical USD/CAD (US dollar against Canadian dollar) trade. To buy or sell a 100,000 of USD/CAD without leverage would require the trader to put up $100,000 in account funds, the full value of the position. But with 50:1 leverage (or 2% margin required), for example, only $2,000 of the trader's funds would be required to open and maintain that $100,000 USD/CAD position.

Many traders define leverage as a credit line that a broker provides to their client. This isn't exactly true, as leverage does not have the features that are issued together with credit. First of all, when you are trading with leverage you are not expected to pay any credit back. You are simply obliged to close your position, or keep it open before it is closed by the margin call. In other words, there is no particular deadline for settling your leverage boost provided by the broker.
The forex market is the most liquid and active market in the world. At every single second an enormous amount of transactions gets executed, with the total daily turnover being regularly estimated to reach trillions of dollars. If we did not make use of an analytical tool such as a forex chart to place the data into a more compact form where it can be visually examined and analyzed, we would be in possession of a vast sea of difficult to interpret numbers. The forex trading chart, then, is a visual aid that makes the recognition of trends, and patterns in general easier, and makes the application of technical tools of analysis at all possible.
Currencies are traded on the Foreign Exchange market, also known as Forex. This is a decentralized market that spans the globe and is considered the largest by trading volume and the most liquid worldwide. Exchange rates fluctuate continuously due to the ever changing market forces of supply and demand. Forex traders buy a currency pair if they think the exchange rate will rise and sell it if they think the opposite will happen. The Forex market remains open around the world for 24 hours a day with the exception of weekends.
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