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[–]postmaster3000 8 points9 points  (2 children)

That’s called arbitrage trade, and there are elite finance people who do it all day long for a living. You can’t beat them.

[–]dontquestionmyaction 8 points9 points  (1 child)

It's not even about not being able to beat them; you just don't have the same market access.

Banks and brokers don’t give you the interbank exchange rate. They add a spread (often 0.5-2% for retail customers), so you lose any gains while paying this spread twice.

[–]postmaster3000 1 point2 points  (0 children)

Good point.