I don't get you haters. sure the title is a bit misleading because he never really discusses what his alphas were. But its a pretty good high level description of the architecture of a hft system. I was a quant at GS and these are not the retail investors you pick off. You have your own set of alphas and most of them are meant to pick on mom and pops clicking away at home. This guy didn't reveal his strategy but nevertheless the graph shows his strategy had a significant edge. The lifetime of a strategy also looks like that. It is another thing that his title for the post is kind of off.