The 200 SMA plays a significant role on the GBP/USD. It has been changing from support to resistance several times during the last month and obviously many traders put their orders around its levels. The resistance looks too strong for the GBP at the moment but a break-up can take it to 1.63: ( attach the pic to the post).
http://www.sunbirdfx.com/templates/e...gbpusd0911.jpg