Sept. 24 (Bloomberg) -- The dollar may weaken further against the currencies of six major trading partners as a gauge of greenback strength formed a so-called head-and-shoulders trading pattern, according to Royal Bank of Canada

The resolution of a head and shoulders pattern for the Dollar Index paints a very ominous bearish profile for the U.S. dollar over the next 10 to 12 months,” George Davis, chief technical analyst at the Royal Bank of Canada’s RBC Capital Markets unit, wrote in a note to clients yesterday