Based in Kansas City, Missouri, they regularly account for 5% of the total trading volume in the US stock market.

[2] According to the founder, Dave Cummings, as of 2008, the firm "typically held stocks for 11 seconds", and "had not had a losing day in 4 years".

[4]: 188–192 In 2005 Cummings left Tradebot to start a new electronic market, which he called the Better Alternative Trading System.

[5] In summer 2014, New York Attorney General Eric Schneiderman accused Barclays of hiding that Tradebot was one of the largest participants in their dark pool.

[6] The Wall Street Journal reported that the firm had a nearly 14-year streak of profitable trading every day, that ended in 2017.