thanks a lot for your quick reply and your help but unfortunately it's not working.
be careful : when we have 0 recored in the database, the store is opened...( we have some stores with no traffic..)
(each day... Store managers have to enter the traffic in the cash registers... )
So to detect if the store is opened is to check "the missing value"...
But test after tests, I think I will handle this problem in the load script.
I explain :
This "tips" seems to be working with a several days selected...
For exemple if I select one store and one day with not data recorded.. qlik view will hide the store.
but If I selected two days... the first with traffin and the second one with no traffic (no row for the given store in the database) this working..
I have one cell with an amount and the second one with "closed".
qlikview "auto hide" elements with no data.. I'll manage this in a script load, by generated aditionnal row for "closed" days..
thanks for your help.