This looks really nice, I like the fact that I have the history in front of me and editable while I'm using it. Just an idea, it might be more useful to show $9 in EUR instead of $9 in Euro. I foolishly tried to do $9 in Peso, wondered why it wasn't working, figured out I had to do $9 in MXN, had totally forgotten you'd generally want to use the ISO Code.