HFT just predicts and outruns any market participant's behavior, if market participants use technical analysis then HFT would reflect that.
http://www.cftc.gov/ucm/groups/public/@economicanalysis/documents/file/oce_flashcrash0314.pdf
http://www.cftc.gov/ucm/groups/public/@economicanalysis/documents/file/oce_flashcrash0314.pdf