In PayPal, a transaction in a foreign currency results in 3 transactions 

- Transfer from my Base Currency PayPal Account to Foreign Currency PayPal Account

- Transfer to my Foreign Currency Paypal from the Base Currency PayPal Account

- The actual transaction

While I get the need to have separate accounts for currency, it's a hassle to have to calculate the actual exchange rate and then populate it in two of the transactions (as one of the transfers will match when I put the currency in)

Given Zoho knows that there is a link between these accounts, we should be able to derive the currency and populate it in the currency field for both the transactions. Or, use this information to set the exchange rate for that day - although I guess this could have implications for other accounts that use exchange information.