thanks for the link x_aSha_x
the last three were frightening.
¦ 10 per cent of HFT orders exist for between 10 and 100 milliseconds
¦ 40 per cent of HFT orders exist for 1 second or less.
¦ 65 per cent of HFT is intraday turnover that is flat at day's end.
Retali investors are already disadvantaged without this.