Google’s John Mueller said on Twitter that Google does not read or interpret the content of embedded charts. If you include JavaScript charts from Google or another company, Google will treat the chart as an image.
We treat them mostly like images, we don't read / interpret the content.
— John ☆.o(≧▽≦)o.☆ (@JohnMu) April 28, 2018
If you want Google to index the content of the chart, it’s probably good idea to add a table with the chart data on the page.
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