My first thought would be d3.js or ZingChart . d3 is open source, but the learning curve is pretty steep. ZingChart is closed, but much more accessible and provides support. As soon as you hit 50k + points, other libraries begin to experience problems.
Disclaimer: I am on the ZC team. Feel free to contact us if you have any questions.
SFC. Next time you can send a message to softwarerecs . Be sure to check out your recommendations.
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