Computer and automated trading is quite common, but high frequency trading (the whole trading shares 1ms faster) isn't.
Bloomberg shows how the high frequency industry won 1billion dollars last year in profits, but the stock market has a total size of
33.6$ trillions (there are better comparisons but I think this will do). So, high frequency trading (trading at 1ms faster than other people) accounts for a 0.002% profit on the total value of the stock market, an extremely small amount of little if any significance. Even if you think this 0.002% is bad you need to focus on the other 99.998% when thinking of the stock market.
