Below is the technical chart of GBPUSD with Doda-Donchian and Ichimoku Kinko Hyo indicator.
On 30-Nov-2011, Doda-Donchian gave buy signal on this chart @1.55688. The same was confirmed by Doda-Bollinger bands also. But GBPUSD is trading near high resistance area viz. 1.5787. It MUST close above this level to start its bull run. On the downside, the support is at 1.56606
Watch these levels carefully.