Hi,
We appreciate you reaching out to us with your inquiry.
7000 charts is a huge number (adding to that stock charts and the usually large amount of data in such charts, this can cause performance issues). You can of course test it, but unfortunately, we cannot guarantee it will work without problems. It would also be necessary to set up workers and keep a proper balance between workers, the worker's limit (--workLimit), and a large --timeoutThreshold.
To sum up, 7000 is a really big number and it can be a problem to get it running. Please take a look at this link on performance in highcharts export server:
https://github.com/highcharts/node-expo ... nce-notice
If I may clarify any issues/matters I am available at your convenience.
Kind Regards