KEY POINTS
  • Order flow revenue at Robinhood surged 227% in 2018, according to research from Alphacution.
  • Robinhood has faced criticism over that piece of its revenue model, which relies on selling customers' orders to high-frequency trading firms like Citadel Securities and Virtu.
  • The so-called "payment for order flow" practice remains opaque and controversial. But it's common among other Wall Street broker dealers like TD Ameritrade, Schwab and E*Trade.

The revenue Robinhood gets from a controversial practice of selling customer trades to high frequency trading firms is skyrocketing, according to new research.

The popular millennial stock-trading app brought in $69 million in order routing revenue in 2018, according to a new estimate from Alphacution Research, three times what the company brought in a year earlier. So-called "payment for order flow," is a common practice on Wall Street.