@steveklabnik That comments states the exact opposite:

You:
> With that debit, the captured currency would be USD, not EUR.

Marshall:
>`currency` is your base currency (currently this will be USD for all accounts/escrows). `captured_currency` is the amount you captured in. e.g. you capture in 1EUR with an exchange rate of 1.2 you would see
>
>- currency: USD
- amount: 120
- captured_currency: EUR
- amount_in_captured_currency: 100

Neither of your explanations make sense. "captured amount" should mean the amount that appears for the cardholder.