Most people are unaware that exchange rates change constantly. On the micro level consumers deal, banks (and other financial institutions) will only change the rate a couple of times a day.
I have a nephew in The City (London) who does this for a living. He buys and sells currency, sometimes selling and buying the same currency eight or nine times a day, making money on the ups and downs each time.
Lots and lots of money. I'm trying to get him to write me into his will.
