Import Transfer between 2 Cash Accounts via CSV

Hello,
I am trying to import from a broker the forex exchange the broker did before buy a stock. So basically my CSV file has a TRANSFER inputs where it convert CHF to USD with the exchange rate. So i have the broker account with CHF and then USD. When i buy i should take the CHF and convert to USD. The csv file has of course this transaction done by broker.
So i tried to import it but doesn’t recognize it. How to import the Transfer between 2 CASH Accounts of the same Security Account?
It recognize as USD but should be CHF. Which flag should i use?
The csv file has the CHF value, USD converted value and the Exchange rate.
Please let me know,

BR

This as feature is in consideration but actually, it is not possible.