This is the kind of broken madness that can end an independent trader's career in a millisecond. This is like a near 70 point pop in the ES in a blink. Imagine if they filled your stop 60-something points past where you had it (that can happen easy) and before your fill report pops up it's right back to where it was. Factor in your stop is at a loss point, and maybe you lost 70 points. On a 5-lot, that's $17.5K. Ouch. But I've seen trader's who truly scalp, and do 100 or even a 1,000 contracts. Take a 70 point hit there and you're down $3.5 mil in less than a blink, on a broken market issue. But, if you trade this market you have to realize it's broken, and you might get destroyed with zero recourse.
When the real selling starts I think they will just shut the markets down semi-permanently. They shut 'em down for like four years during WWI if I have my facts straight.
http://www.zerohedge.com/news/2014-12-18/berserk-rampathon-algo-just-bought-sp-2130