I'm sorry but this is not true. You may have direct access to exchanges but according to your 606 report, you are selling your order flow to Lampost Capital and couple of other firms.TradeZero does not sell order flow to HFT. We access the necessary venues to give the client the best execution.
https://us.tradezero.co/manuals/TradeZero-America-Rule-606-Disclosure_Q1-2019.pdf