HFT does not refer to all intraday trading, but rather extremely latency-sensitive (subsecond) strategies. In markets where there is not a legal requirements, s

HFT does not refer to all intraday trading, but rather extremely latency-sensitive (subsecond) strategies. In markets where there is not a legal requirements, such as for US stocks, an HFT would not execute through a broker (not through Robinhood, not through Credit Suisse...they would execute directly with the trading venues they are trading in.)