Wrong values for responseTime in Grafana, Elasticsearch, haproxy

Hi all.
It’s driving me crazy, but I was not able to get a graph on grafana with the responseTime from haproxy.
I have haproxy running, the logs are in ElasticSearch and I am able to get some values to Grafana.
I wanted to plot a graph with the responseTime values and have been failing the last hours.
If I search like responseTime:56, I get the count of the responseTime with the value of 56, but I was not able to get the values on a graph.
Any advises?
I am new in this, so excuse my lack of knowledge.