[crucialfelix]

quite true. but HFT has become a buzzword like "the cloud" and even many financial industry specialists claim to do HFT but in fact they are just market making. auto-scalping or even hedge funds that day trade with robots are not HFT.

this: http://books.google.de/books?id=dobO95EBcqsC&redir_esc=y

even though its over 10 years old, is real HFT. moving correlations, windowed FFT (of bid and transaction events), microscopic operators, negative first-order autocorrelation of returns.

it is NOT about supplying liquidity or being a market maker. that's just market makers trying to say they are in on the latest trend.