http://blogs.fxstreet.com/francesc/2010/05/11/electronic-trading-captures-55-of-total-fx-trading-volume-in-200809/
ELECTRONIC FX: AS GLOBAL MARKETS NORMALIZE, SLOW BUT STEADY GROWTH
E-Trading Displaces Telephone as Primary Trading Channel in Foreign Exchange
Tuesday, May 11, 2010 Stamford, CT USA - Global foreign exchange markets continued their migration to electronic execution last year as e-trading volumes increased amid a decline in overall FX trading activity.
Customer electronic foreign exchange trading volumes increased 7% from 2008 to 2009. While this growth pales in comparison to the 25% expansion in 2007-2008, the fact that electronic trading systems were attracting business while the overall market was contracting suggests that market participants continue to actively shift trading volumes to the platforms from other channels.