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You should be able to use Conditional Subscriptions to get an 'Alert' for any type of chart, including a text table. The idea is described in detail here: Alert! Alert! Turn on conditional subscriptions with 1 click in Tableau 10.1 | Tableau Software . You'll need to be able to create a boolean calculated field that defines the logic of the Alert and based on it you can filter the view to either show something or nothing.
To have even more control on alerts, you should check out VizAlerts: GitHub - tableau/VizAlerts: Data-driven alerting for Tableau Server. However, this does require some setup upfront.
Hope this helps!
Thanks a lot ! I'll try to do it