Hi @Ryan, with wholesale interbank rates, there is a bid / offer spread. Every “roundtrip” results in a loss, even if the currencies would not fluctuate during a “roundtrip”.
Check this: http://www.truefx.com
this:
https://community.revolut.com/t/exchange-rates/5515/18?u=frank
and here:
https://community.revolut.com/t/daft-question-but/5027/7?u=frank
Cheers!