on my work i used the Unique count metric and suppose the value is 6 << remember this value
and then i would make a metric visualization i used unique count and i play value is 6 still ok but then I Filters this
then i copy this filters above and pates into Filters Bucket and value STILL 6 !
i have a question why the value still 6. I Filters in Discover page and value is 0 but i Filters on Bucket value is 6 << (6 is value of UNIQUE COUNT)