Algo traders are exempt from some of the basic rules which...

Algo traders are exempt from some of the basic rules which govern how stocks are traded. They are allowed to break up their so called parcels into unmarketable parcels supposedly so that they can buy or sell significant amounts without influencing the market. In reality some of them appear to use this exemption for purposes other than what it was intended for and at times it appears that they directly manipulate the SP of some stocks.

The rules prohibiting market manipulation are quite clear and these parties aren't exempt from these however there appears to be little if any enforcement of manipulation rules even when the outcomes appears obvious and the actions blatant.

MST is a prime candidate for algo tactics as a single pip movement can yield them a 50% profit.