The bots and human traders are all bounded by rules.
Classic patterns are created by humans thus different from the ones dominated by bots.
Bots are more predictable and bear no emotions.
Classic patterns are driven by uncertainties as all players do not know what the other players may or will do.
Some bots, however, can now peek into the books, seeing what all other players "planned" to do.
It is like playing poker with your opponents showing their hands to you all the time. How hard is it to win the game then?