Please accept my apologies for the delayed response.
The stock chart offers a virtualization mode
that allows offloading most of the calculations to the server.
The demo is available with ASP.NET MVC, Spring and PHP back-end.
In this mode the chart will request only the points for the current period, at the required time resolution.
Therefore you'll only need minute resolution only when the user is looking at a minute time scale.
This greatly reduces the number of actual data points needed to be sent and plotted.
Let me know if you have any further questions.
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