When doing a purchase or sale of foreign currencies the adequate place to do it is the Forex market, and that is because at this market the negotiation is done in pairs of foreign currencies making the the profit margins become bigger.
This allows you to speculate with the quotation of the currencies so that negotiation gives you the biggest possible profits and that can happen because the forex market of purchase and sale operates 24 hours per day, making it become the most profitable in the world.
Moreover Forex gives you the possibility of doing purchases and sales of foreign currencies with futures, this is speculating in a certain lapse of time that a foreign is going to increase its value or reduce it.
Your financing, the highest of all the financial markets, makes it become the most profitable market.
To buy or sell foreign currencies the Forex market works with investment platforms or by telephone, as this has not a physical central place.
It is known that the crisis on the countries, even if they take some time, they can be produced from one day to another depending not only on the economic conditions, but also social and politicals.
That means that operationg through an open market 24 hours reduces the losses margins that you can probably get.
The purchase and sale of foreign currencies is an exciting way of generating profits and depends a lot on your shrewdness and like to know how do economic and financial politics change around the world.