I spent a lot of time doing non-bank automated trading. Most of my efforts were working with TradeStation for several consulting clients. I also did more auto-trading work with prop trading individuals, direct to some API - like PatsSystems, Interactive Brokers, etc. These are all good tools for the non-institution. After several years of using SmartQuant on and off, I met a guy and started talking to him about potentially collaborating on some .net based trading technology. I had done lots of work in the optimization/ machine learning space, he has spent most of his effort doing data feed adapters. He eventually combined his small firm with these folks; NinjaTrader.

These guys seem to have continued on well enough. NinjaTrader seems to be adding features and be progressing nicely. It is an inexpensive way to develop C# based automated trading systems.

 -Chris

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