title: Kibana: Visualize only one entry
body: <p>Our application exposes various metrics through an MBean, these are pulled by logstash and saved to ElasticSearch. Typical metrics are "number_of_connected_users", connection status for external dependencies etc. I'd like to visualize this, but I can't see that Kibana supports displaying only the last query result, discarding the older ones.</p>
  
  <p>I figure I need to either 1) Limit a query to return only one result and then visualize it, or 2) Have the query return multiple results and selecting the last one in a visualization. Anyone done this?</p>