Is it possible too separate account by partner when their balance haven't the same sign? about mis-builder HOT 4 OPEN

I have searched a solution without development.
Here is my Solution =
In queries, add an item on account move line to fetch partner, credit and debit, with a domain corresponding to the account you want to select (in France, for example, I want select clients account only, and the account is '411100')

In KPI's, you can create a line and use the queries. Here I want to have the positive balance of clients only.
As in query I didn't add an accumulation method, we obtain a list. It was difficult to me to find a way to use this list but try to print the list to understand and the light will illuminate your brain as my own.
Here is the expression:

Explanation :
[partner_id.debit - partner_id.credit for partner_id in partner] gives a list of amount calculate with "partner_id.debit - partner_id.credit".
We calculate the sum of element (elt) where elt is positive or null.

Pro : I have the right amount without compensation between positive and negative partner's accounts
Cons : I don't have the detail anymore.

My way.

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Clever solution.

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Problem with my solution : the comprehensive list do not order the sum by partner but by sign. If someone could test this and give ideas ...

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