So I had a look at the 'management tab' and played with the indexes.
Now on the Discover page I have found:
NB: My * isn't appearing below and comes up below. So I'll use % for wildcard
%:logstash-% index/filter/whatever it is, the default option. Yields no results.
% - gives me results
Elastalert_status% - gives me results.....
So now I wonder why logstash* isn't working