Relationship - show lines with no values

HI All

I am trying to achieve something that in my head seems easy, but I can't find solution.

I have 2 tables:

- Stock - with sales indexes like this:

- second with sales, like this:

There is one way relationship between those tables (stock filters sales). 

I made matrix visual where I want to show all indexes from first table and sales if there was any.

I don’t want sales table to filter index table. I expect to achieve, something like this:

It works ok for the indexes that have sales but indexes that have no sales are filtered, so i end up with such visual:

Is there any way to avoid this filtering? is there somewhere option "show lines with no values" etc.?

I tried to change relationship type, run through settings but still no success.

I would really appreciate your support.

Thank you!