[yummyfajitas]

I agree that there are improvements that could be made to the HFT world. Most notably, eliminating the subpenny rule, which acts as a minimum wage for HFT:

http://www.chrisstucchio.com/blog/2012/hft_whats_broken.html

http://www.chrisstucchio.com/blog/2012/subpenny_rule_respons...

I'm just suggesting that using a callback API rather than polling is hardly a great example of HFT shenanigans.

[jmcmichael]

I don't think that someone as apparently smart as Haim is spent a year of his life troubleshooting an API call. There's got to be more to it than that.