Performance des positions en monnaie

Hello, hm I do not know much about such situation, I hope other can help.
Would it be incorrect to use cash deposit account in EUR and JPY with deposit/removal/transfer ? Given than PP has the exchange rate already.

How is configured the security EUR/JPY ? Like this


or

or something else ?

Do you have one simple case with a single buy and the expected result ? “I bought xx JPY with YY EUR on 14 Nov 2024, today exchange rate is .. I expect to see bb € gains/loss”.

I found this topic, which may be similar to your case ?