Lime Brokerage, a high-frequency agency brokerage and trading technology provider, has launched an options trading platform.

FORBES: Lime Launches Options Trading

And despite the mind-boggling technology now involved in high-frequency trading, where algorithms do battle in slivers of a second, the stock world is taking on shades of a street fair in Mexico City.

FORBES: Welcome to the Stock Bazaar

S. (Global Vibration System) technology, allowing for the high-frequency vibrations from the motors to be felt not only on the wheel itself, but also throughout the cockpit's entire steering column and pedal set.

ENGADGET: Thrustmaster unveils Ferrari Vibration GT Cockpit 458 Italia Edition and Ferrari gamepad for Xbox 360, we go hands-on

The Chicago Board Options Exchange has chosen technology from Solarflare and Arista on 10 Gigabit Ethernet for high frequency trading across CBOE Holdings.

FORBES: CBOE Speeds up Network With Arista, Solarflare and 10-Gig Ethernet

But exchanges are technology companies now, catering to electronic traders and high-frequency trading firms, and competing with dozens of electronic markets and dark pools.

FORBES: Plugging in a Global Exchange

Larry Tabb, founder of the financial technology research firm, TABB Group, has in the past made two key points related to high-frequency trading.

FORBES: High Frequency Traders -- Cost Reducers or Criminals?