Photo: Scott Barbour | Getty Images

Welcome to a busy week for central bank meetings.

Here's how to trade on a big one.

Australia, Britain, Europe, even Iceland - central bankers are gathering in a slew of countries. Brian Kelly of Shelter Harbor Capital, has his eye on the Bank of England.

"It's very difficult to play this game. I don't feel like I have an edge with the European banks" given the uncertainty surrounding Greece, he says. "I'd much rather play the British pound."

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Kelly thinks expectations for quantitative easing in Britain are high.

But with a new surprisingly strong PMI report, "I think it's going to be very difficult to justify a massive amount of QE," he told CNBC's Melissa Lee.

Kelly argues that while most investors are expecting about $75 billion in quantitative easing, the actual number is likely to be smaller - possibly $50 billion. "On that, I think you get some strength in the British pound."

Kelly wants to buy the pound against the dollar at 1.58 with a stop at 1.57 and a target of 1.6150.

, chief markets strategist for J.P. Morgan Asset Management, Institutional, thinks this week's

could also help Britain. She expects Mario Draghi, the bank's president, to point to a number of positive European economic reports, and that could give the pound a lift.

You can watch the discussion on the video.

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