http://ninjatrader.com/support/helpGuides/nt8/en-us/
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https://robusttechhouse.com/python-backtesting-libraries-for-quant-trading-strategies/
https://www.backtrader.com/
http://ta-lib.org/
http://gbeced.github.io/pyalgotrade
https://github.com/quantopian/zipline
