Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How can I find out how much a currency is traded? 
This is actually a fairly hard question to answer well as much of the currency trading that is done in financial markets is actually done directly with banks and other financial institutions instead of on a centralized market and the banks are understandably not always excited to part with information on how exactly they do their business.  Other methods of currency exchange have much, much less volume though so it is important to understand the trading through markets as best as possible. Some banks do give information on how much is traded so surveys can give a reasonable indication of relative volume by currency.  Note the U.S. Dollar  is by far the largest volume of currency traded partially because people often covert one currency to another in the markets by trading "through" the Dollar.  Wikipedia has a good explanation and a nicely formatted table of information as well.