Hi
Cyrille,
Currently, the export options for the stock chart are
located within the export dropdown menu of the period selector. However, we do
not have a dedicated method for exporting the stock chart independently.

However We have
considered your reported scenario as improvement and logged a feature
request on this. Based on other logged tasks priority, we will include
this improvement in any of our upcoming release. You can keep track
of an improvement from the feedback portal below.
Feedback: https://www.syncfusion.com/feedback/47497/method-to-export-the-stock-chart-to-image-pdf-and-xlsx
Regards,
Gopalakrishnan Veeraraghavan