For super-fast traders, there's a way to jump ahead in line

The Wall Street Journal
For super-fast traders, there's a way to jump ahead in line:
http://on.wsj.com/PTTpTQ

High-frequency traders sometimes use a special type of order to step in front of ordinary investors to buy and sell stocks. The maneuvers are executed in a fraction of a second, fueling concerns about whether the fastest traders gain unfair advantages.

Graphic: Mike Sudal/The Wall Street Journal