Newbie Question: Who uses the Foreign Exchange market?

Who uses the Foreign Exchange market?
Is there an actual Exchange where currency prices are determined?

Watch the video:

http://www.investopedia.com/terms/fo...#axzz1ticKnpAg

Thank you for your response..

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The Forex market is the most profitable online earning market in this world. Many people earn a lot of money every day from this market.

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