Quote from zedDoubleNaught:
Everything is random. The random parts interact and then influence each other. Then they spontaneously synchronize from that interaction to move in one direction over time. But synchronized movement over time would be a stable, somewhat predictable move, or possibly the concept of a "trend". But I don't know, maybe this process or contradiction is what we're looking for.
It sounds like your take is accurate, and I think that behavior is what his research and his firm's profitable trading take advantage of. I also think people might disagree that the "everything is random" conclusion is fully justified by being able to exploit that particular behavior though.