title: kibana problems on plotting a single value without metrics
body: <p>Hi all I've a issue problem on visualizing a single value on timestamp. Let me to make an example in order to help you to detect the real problem. I would like to visualize the value, that could be a metric like ANGLE value or price of an item how is move in time but, I'm interested on visualize the average or sum value but only time as x axis and at y axis the real value. I manage to create a dashboard with values and timestamp but the value are aggregated using different metrics like average, count document or sum. Can somone is able to fix this problem?</p>