FXStreet (Edinburgh) - The sterling is now gathering further traction vs. the greenback, sending GBP/USD to test session highs near 1.4300 the figure. GBP/USD stronger on UK data The pair has seen its daily upside accelerated after UK GDP figures have matched expectations today, showing the economy has expanded 1.9% on a yearly basis during the fourth quarter and 0.5% QoQ. Further releases saw the Index of Services advancing 0.6% on the three months ended in November, up a tad from the previous 0.5% gain. GBP/USD relevant levels As of writing the pair is up 0.33% at 1.4293 and a breakout of 1.4408 (20-day sma) would open the door to 1.4659 (50% Fibo of 1.5240-1.4079) and then 1.4811 (55-day sma). On the other hand, the next support lies at 1.4079 (multi-year low Jan.21) ahead of 1.4049 (monthly low feb.2009) and finally 1.4000 (psychological level). For more information, read our latest forex news.