In Ray Dalio's book Principles, he attributes his success to modeling the markets with computers, but never relying solely on them.

All trades would be looked at by an actual human, making sure that everything made sense and lined up.

I have my own doubts about a purely algorithmic approach (for now at least). Computers are great for many tasks, but for something as inherently irrational as the markets I think that should be at least partially moderated by a person with a deep understanding of the markets.