I guess it depends on your definition of "fast and sophisticated" but any decent trading system can do 5 orders a second.

Any trading system used for actual algo trading can do 100 orders/second without blinking. High frequency starts around 1,000 orders/second.

It would be hard for a "retail investor" like myself, but 30 seconds is a lifetime to the high frequency guys. I'm sure there is a pretty big group of people who would have no trouble doing it.

I think the current state of trading technology at the moment could be perfectly described as, "very fast and sophisticated."