FAQ

Does Highcharts refer to files outside our domain?
For basic usage, Highcharts does not refer to any files outside the Highcharts library, though there are some cases that you should be aware of. The expor...
Mon, 1 Jul, 2019 at 10:48 AM
My charts are not showing in Internet Explorer 7 or 8
To support browsers older than IE9, some polyfills are needed. See the System Requirements article for details. The most common reason why a chart works...
Mon, 1 Jul, 2019 at 10:55 AM
Are you hosting any of our data when we use Highcharts?
We offer JavaScript-based visualization libraries that can visualize arbitrary datasets on web-pages. We do not offer any ready-made data adapters to conne...
Fri, 15 May, 2020 at 8:46 PM
Labels of axis are displayed above the tooltip.
Such situations occur when axis' labels have a property called useHTML set to true. In a nutshell, the reason for labels display like that is because H...
Mon, 1 Jul, 2019 at 11:01 AM
How can I get the best performance out of Highcharts?
When working with series with a high number of data points, there are a few things to consider.   First of all, consider using the Boost module. Otherwi...
Fri, 15 May, 2020 at 10:53 PM
Can I export multiple charts to the same image or PDF?
Currently this is not implemented in the core, but there are a couple of paths you can take to achieve this.  Use our hack for exporting multiple charts. ...
Mon, 1 Jul, 2019 at 11:07 AM
Can I add a data table to the exported chart?
A data table can be added to the chart by using the export-data module and a simple option, exporting.showTable. This table does not support exporting to SV...
Mon, 1 Jul, 2019 at 11:12 AM
My non-English characters don't display right in my charts.
If you're using German umlauts, Scandinavian vowels, or non-European alphabets, you need to use UTF-8 encoding for your files. There are two ways of do...
Mon, 1 Jul, 2019 at 11:14 AM
HTML elements are not visible in exported image.
To make them visible, you must use the exporting.allowHTML option. Setting it to true allows HTML inside the chart, directly in the exported image. Exam...
Mon, 1 Jul, 2019 at 11:15 AM
Can I synchronize several charts?
Yes, by making small changes and additions to the code it is possible. More information can be found in our blog article on Synchronisation of multiple c...
Wed, 26 Jun, 2019 at 12:16 PM