Forex Trading Volume Indicator

Volume indicator for forex markets?
Hello, i trade forex markets and i want to find an indicator similar to “volume” which i use when i trade commodities because this indicator is very critical in my trading disicions. Can someone help?
If your trading decisions are short term, as already suggested volume will only reflect your brokers data and platform not the entire market. metatrader charts is widely used and has vol indicator, free also, so it might help. OBV (on balance volume indicator) might also be of aid.
If your trading decisions are longer term then look at the Official COT report ( Commitments of Traders)
http://www.cftc.gov/MarketReports/CommitmentsofTraders/index.htm. (scroll to Chicago Mercantile Exchange). It’s lagging data but it does give you a heads up on volume of short and long positions.
Trading Volume Indicator on Your Day Trading and Swing Trading Charts