I can make you an Automator task to run on your file before importing it, it would remove D's and C's and replace them with the signed amount. Would that be OK for you ? Because otherwise it would be very complicated to make it directly in iCompta without messing up the user interface.

Could you post or send me via email an example of your csv file (just a few lines should be enough) ? Thanks
I will add credit and debit import fields as an alternative to the signed amount field.

I have one but I keep it secret
Just kidding, I didn't have time to formalize it yet and put it online.

Frequency will be customizable in a future release so you will be able to set 4 weeks.

Auto save is enabled and runs from time to time, obviously not enough in your case... sorry.

I hope so ! Thanks a lot

Thanks for your explanations, yes "operation type" = "category". I will change these terms as sou suggested.