Pulse can be currency independent, which means we just show the numbers, not the currency that they represent. This works well for people who deal with just one kind of currency, but can cause a few headaches for people who have income and expense items in multiple currencies.
If you want to set currencies for your financial accounts, you can do that. You can also run reports in different currencies if you're on our Plus or Premium plan, regardless of what currency you set on the individual accounts.
To set up currencies for your financial accounts, read this tutorial.