Kibana 4 Metric visualization show latest value-open source projects elastic/kibana

I’m new to Kibana and Elastic Search and i have run into this problem:

My ES contains (among other stuff) also data containing the current value of one custom performance counter and i would like my dashboard to show this value, e.g., as a big number – therefore i tried to use the Metric visualization, but i have no idea on how to show only the last value. Any help would be highly appreciated. Thanks.