How to add custom tooltips to Candlechart(Google Charts)

Question

I have data coming from a spreadsheet of Google Docs and use Candlechart to display data via JavaScript How can I customize the tooltips?

I do not construct data with google.visualization.arrayToDataTable or similar constructor, so how do I achieve custom tooltips ?

Answer 1

This page from Google explains how you can do this. At the bottom of the page it says CandleStickChart is supported.