Marriott was taken the house with one of the more egregious examples of HFT instability within recent weeks. It started during the 10:07 period. Here's the price chart and notice that major candle extension in the following minute. Remember though, this "direct evidence" doesn't exist.
Nanex disseminated the truth on to the traders with in minutes, the SEC is still figuring out to use a Commodore 64
From Nanex:
Nanex disseminated the truth on to the traders with in minutes, the SEC is still figuring out to use a Commodore 64
From Nanex:
Nanex ~ The Marriot Event on March 27, 2012
MAR 1 millisecond interval chart showing the NBBO and trades from all exchanges.
This chart shows about 1/2 second of trading.
MAR tick chart showing quotes and trades.