The news calendar, for backtest.
for example:
http://www.forexfactory.com/calendar...th=1&year=2007
or
http://www.fxstreet.com/fundamental/economic-calendar/
for example:
http://www.forexfactory.com/calendar...th=1&year=2007
or
http://www.fxstreet.com/fundamental/economic-calendar/