just what this young fellow did wrong?

Link:http://www.telegraph.co.uk/finance/financial-crime/11562115/Flash-Crash-trader-Navinder-Singh-Sarao-to-spend-weekend-in-jail.html

Comment:

HFT I understand is common practice by all the big trading houses, banks etc.

I myself have put bids in and cancelled them before they were executed.

I've also revised my offer after cancelling my original offer.

To my knowledge there is no limit put on the number of trades anyone can make.

I can't understand how someone can be guilty of doing something that the system allows them to do.

As far as I can see, he does what the "big boys" do, only they get away with it, immoral but not illegal.

Is he guilty because he is not TBTF? and must be made an example of a la Martha Stewart?

"We live in interesting times"

Good Luck to all!