title: kibana/elasticsearch advanced query
body: <p>I am sending events with logstash to an elasticsearch database. An event is structured like this:</p>
  
  <pre><code>timestamp:2014-04-04 12:00:00 name:'leo'  time:10
  timestamp:2014-04-04 12:00:30 name:'john' time:15
  ...
  ...
  </code></pre>
  
  <p>In the Kibana interface, I am able to display some graphs; for example, the mean time of the timestamp.</p>
  
  <p>Since logstash is continuously sending events, I would like to display the latest event sent in real time. Is it possible to write a query which will only return the latest event, using the timestamp field? I don't want to touch Kibana's "time filter"</p>
  
  <p>Thanks in advance for your help</p>