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TOSDataBridge
A collection of resources for pulling real-time streaming data off of TDAmeritrade's ThinkOrSwim(TOS) platform; providing C, C++, Java and Python interfaces.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Did a quick search, and it looks like this is likely to be a good starting point: https://github.com/jeog/TOSDataBridge
If using python the PyTradier library is a good foundation to start from. https://github.com/rleonard21/PyTradier
NOTE:
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Hence, a higher number means a more popular project.