High-Frequency Trading (HFT) is one of the most controversial topics in trading today.  HFT now makes up more than 70% of all US equity trades and up to 95% of all market quotes.  While some see it as the natural evolution of technology, others see it as a potential risk to the marketplace.

The following infographic courtesy of Investoo.com illustrates the history, development and technology of High-Frequency Trading.