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Brexit would be ‘catastrophic’ but may help the dollar: Trader

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In one month, the United Kingdom will hold a key referendum to decide if the country will stay in the European Union. While the world is watching and worrying about the result, some traders are looking to the currency market to help them cash in should the so-called "Brexit" really come to pass.

"What I think the currency impact will be is that actually, [investors] will flow to the dollar from every angle, because of course I think the British pound is going to weaken substantially," said Boris Schlossberg, managing director of FX strategy for BK Asset Management.

"It could also create an enormous amount of pressure on the euro, because the next question is going to become, 'If the UK is out, who's going to be next?' So the safe haven trade to the dollar will probably be the strongest trade we see from this," Schlossberg said Monday on CNBC's "Trading Nation."

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Longer-term trends favor buying the dollar against the pound as well. Oppenheimer technical analyst Ari Wald points out that the British currency has been slipping over the past few years.

"The pound's been making lower highs since 2014, still below a falling 200-day moving average," he said. "So for now I think before we get more stabilization, I think you play for the breakdown of 30-year support below $1.40."

Beyond the currency impacts, traders and analysts warn that a Brexit could badly damage global markets, especially since the UK could set a precedent for other European countries to follow.

"It would be catastrophic from every possible angle, because it will create chaos the likes of which we've never seen before," said Schlossberg. "If they leave, they open up a Pandora's Box for everyone else including Italy — which is on the verge of tipping into a recession right now — to want to go leave."

"They will basically untie the whole European Union by creating this one act of defiance," he added.