LINESTX multiple categories

Hello Guys, 

I'm new with the Linestx function, 

i'd like to get the table with the slope etc, 

However my fact table is particular, this table is called 'get'

it has types of movements like this 

and a Calendar (habitual one) with date, month name, blablabla, called 'Calendar'

I would like to create a linestx with calendar dates, and get table, with quantitites, per item (i also habe an article table called 'Base Article', that i'd prefer to use if possible), And per Warehouse.

so the regression should be done 

with sales of items per date per warehouses, is this possible?

i have tried with using a summarized table like this

Frequence ventes = 

SUMMARIZE(

    FILTER(

        get,

        get[LIBELLE NATURE DE MOUVEMENT] = "Ticket"

    ),

    get[CLEF UNIQUE ARTICLE],

    get[DATE PIECE],

    get[DEPOT],

    get[Ventes],

    "Nb qté ventes (chiffre)", COUNTROWS(get)

)