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GBP/USD spot rate at time of writing: 1.3819Bank transfer rate (indicative guide): 1.3435-1.3530FX specialist providers (indicative guide): 1.3634-1.3722More information on FX specialist rates, hereSet an exchange rate alert, hereThe British Pound was set to close out the week with an advance in the region of three-quarters of a percent against the Dollar, thanks to a strong recovery move during the Friday trading session.

The Pound-to-Dollar exchange rate (GBP/USD) recovered from earlier daily lows at 1.3717 to trade at 1.3812 at the time of publication; if the pair close around current levels the weekly advance would register at 0.75%.

"Sterling corrected its early hours' decline as it neared its 100-day MA at 1.3708 that has marked a solid support marker for the GBP since September," says Shaun Osborne, a foreign exchange strategist at Scotiabank.

Above: Weekly price action in the GBP/USD exchange rate in 2020-2021.

But he adds that the currency's recovery is facing a solid level of resistance that might cap an attempted extension of the rebound:

"Sterling is now back to flat on the session with a strong ~70 pips rebound but facing solid resistance at the 1.38 level which it has tested in multiple occasions in the past two days as it holds a modest uptrend."

The question of nearby resistance is a theme also observed by Erik Bregar, Head of FX Strategy at Exchange Bank of Canada.

"GBP/USD teasing yet another breakout above 1.3800 resistance, but so far is failing once again," says Bregar.

Image courtesy of @ErikBregar

Bregar notes that Sterling flows "stole the show" earlier having plunged 50pts to support in the 1.3710s.

"Sterling’s strong rebound correlated nicely with strong opens for the FTSE & DAX, with softer global bond yields (off their European opening highs)," he says.

The British Pound's strong 2021 performance has faded against most of its peers this April, but this underperformance is not as obvious against the Dollar which has also fallen across the board.

A number of analyst suggest the Pound and the Dollar both benefited from a rapid vaccine rollout in the first three months of the year, which offers the prospect of a sustained unlocking of their economies.

However, it now appears this vaccination advantage has run its course and is in the price of the two currencies.

"Sterling’s gains on the back of vaccines have been seemingly exhausted and may have been temporarily dented as the UK hit a snag from supply delays, which means countries that had been considered laggards (such as Germany and Canada) are now giving shots at the same daily rate as the UK, albeit with a significantly lower share of the population vaccinated," says Osborne.

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He adds the UK currency is also liable to strengthen in the lead-up to the Bank of England's meeting in early-May as taper expectations build.

'Taper' refers to an expectation that the Bank will start unwinding its quantitative easing programme in response to a recovering economy. The rule of thumb in foreign exchange is that tapering and raising interest rates tends to result in currency appreciation.

Expectations have built that a strong economic rebound through the duration of 2021 will allow the Bank to step back from offering ultra-supportive monetary conditions.