Accounts initial exchange rate
When creating an account in a foreign currency, or setting an account's currency to a foreign currency, Squirrel will ask you for the exchange rate of this account.
This rate is an initial exchange rate. It will be applied to transactions until you add transfers from another account, at which point the exchange rate will be updated according to the exchange rate of those transfers. As such, it should reflect the exchange rate at the time of the initial balance.