My a/c with IB is in base currency of GBP. All the time I earn some income in EUR and USD. My GBP net fluctuates depending on exchange rates. Periodically I can convert EUR and USD to GBP manually. But is there a procedure where IB will covert them automatically at the end of the day all my balances from EUR and USD to GBP? Thanks for the information. I am trying to avoid currency fluctuations.