Market Manipulation and Technical Perspectives

Was reading some interesting info on high frequency trading and the ability of not only funds to move the market, and the idea of adjusting tick bias by the market makers. We have some brilliant writers on this forum. Just wanted to open a thread on perspectives on market manipulation. Here is what I had for inquiries. I noticed when trading the S+P that at critical technical decision points there would be extreme volume spikes. Do you believe in the "plunge protection team"?... Full Discussion