Thistime,no need to go to the banks because they are all involved in order to compete with the private firms.They have the money and resources to invest into those super computers while we retail investors don't and they constantly buy and sell on their own to generate a set result for their own ends and that,s manipulations and should be illegal.The Americans had raised enough attentions to put these trading practices under intense scrutiny and forced them to move into something else but short of declaring them illegal.If they had done so,all canadian resource stocks trading under the american exchanges will also be affected and these guys will not dare to touch anything with an american listing and risk a lawsuit.