They recently launched. I use Tradehawk. Its solid. I like it. I was using TOS and shifed to Tradehawk to save on commissions. Its hard to tell, but feels to me my executions with TH are much better.
I do not use IB but another broker. In my opinion this is how it functions. I use a REST based API. I open socket streaming which allows me to receive updated market data in a realtime. When the Brokers ticker plant gets a real time update from the exchange, their system processes an event...
Hi up5inthree. I have been trading with Tradier for more then 2 years now. My experience has been very good. I have looked at QuantConnect earlier and liked its backtesting.