Cyrille,
We can download stock chart data through the 'Export' function, which
allows you to export the data in both XLSX (Excel) and CSV formats.
We have attached a sample browser demo for your reference.
Sample Browser: https://ej2.syncfusion.com/aspnetmvc/StockChart/Default#/material3
Click the Export button to access the export options for XLSX and CSV
formats, which will allow you to export the stock chart data in Excel.
Kindly revert us if you have any concerns.
Regards,
Nishanthi