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Quantitative Finance

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    $\begingroup$ Most definitions would still include something on the of order 10s of milliseconds as HFT. If you can find something sufficiently novel to exploit at that frequency, it is probably at least possible with some retail product. $\endgroup$ Commented Feb 9, 2011 at 7:37
  • $\begingroup$ Any alternatives to IB in the retail world? $\endgroup$ Commented Feb 9, 2011 at 7:41
  • $\begingroup$ Or at least not impossibly expensive! $\endgroup$ Commented Feb 9, 2011 at 7:42
  • 4
    $\begingroup$ gndt.com and limebrokerage.com is probably as close as you can get but you'd have to do significant volume in order to get a commission structure that lets you take advantage of any short term opportunities $\endgroup$ Commented Feb 10, 2011 at 3:03
  • 2
    $\begingroup$ I worked in this area for 8 years. Most HFT algos are actually quite simplistic and typically a limited size opportunity. The key to making money is Time & Price priority. The first person to arrive normally gets the majority of the profit. This is why speed is critical. We were beating our opponents (which we could see in the order flow) by as little as 10 microseconds. That was enough, but they always worked to improve their game and so did we. Faster computer, faster algos, faster networks. Everything was critical and no IB wouldn't cut it. For that game neither would Lime. $\endgroup$ Commented Jun 22, 2016 at 4:43