I believe you are wrong, if I am to believe my trader friend to whom I showed this thread and answered: “Trivially true in the 'of course does behaviour of oth

I believe you are wrong, if I am to believe my trader friend to whom I showed this thread and answered: “Trivially true in the 'of course does behaviour of others matter' sense and in the 'could my actions influence others'. Not necessarily operational though. Fine line from there to 'spoofing' (== placing trades solely with intent of engaging others to trade at price level) -- with is VERY EXPLICITLY not allowed and for which you can get fined and go to jail. Recall the case of that poor SOB out of London who was made a poster boy for the flash crash?” It seems there is regulation against this.