Custom tooltip for extended trace

Hi
I am using heat map. whenever mouse hover the chart showing tooltip. But Labels are showing x, y,z.
I need to show labels like Time instead of x. Latency instead of Y. In y value i need to show 20000 instead of 20K.

Using this hoverinfo i modified. But i am streaming the data using extendTraces. For new data how to add hoverinfo.
pl let me know.

Pl chk the below link
https://jsfiddle.net/1yLavejg/6/

To do so, you’ll have to include your custom hover in the trace text array, see example here: http://codepen.io/etpinard/pen/RGJpoO

You might want to subscribe to https://github.com/plotly/plotly.js/issues/265 which when implemented should make it a little easier to do.