British Pound Technical Analysis: GBP/AUD, GBP/CAD, GBP/NZD Rates Outlook Advertisement GBP/AUD rates, on the other hand, have recently been rejected from a multi-decade trendline. Longer-term Influences Take Shape in GBP-crosses With May in the rearview mirror, it’s a good time to take stock of the British Pound’s performance against some of the more volatile major currencies, which were plagued by – you guessed it – volatile if not weaker commodity prices over the course of the month. While currencies linked to energy may be the exception to the rule, those with strong economic connections to agriculture and base metals faced tougher sledding (particularly the latter).