Valeria Bednarik, chief analyst at FXStreet explained that the GBP/USD pair remained under strong selling pressure, hitting a fresh 4-day low of 1.4080 during US trading hours. Key Quotes: "There was no catalyst behind this Wednesday's decline, as the UK did not publish any kind of macroeconomic data. But fears of a Brexit have been lately exacerbated, after a new poll showed the lead of the Remain campaign is slipping." "The UK is expected to release its February Retail Sales figures for February during the upcoming session, expected to have fall into negative territory, something that will fuel concerns over the economic future of the kingdom, and further weigh on the Sterling." For more information, read our latest forex news.