The forex broker Saxo Bank has an interesting set of analytics some folks may find very interesting. It’s kind of like a Commitment of Traders report for exchange rate pairs based on their customers in that it shows the balance of longs and shorts.
If nothing else, the graph above shows just how dominant EUR/USD is in terms of retail forex trading volume. The other pairs shown don’t combine to match it.
You can change the granularity of the data depicted on the chart both in terms of the days included and whether you’re looking at hourly or daily data. There’s a set of explanations included on the page down below the charts. For forex traders, and perhaps folks looking at the macro view, this could be a useful tool.