Maybe not exactly what you mean by blackbox, but I remember R&W Technical was selling systems that were rocking for 1 -2 years. As I recall $5000 or so a system. Brokers were trading it for their accounts, as well as getting everybody and their cousin into them. Eventually it went South big and took back most if not all those profits. Ended up being a CFTC case against the company and owners. I think they get nailed big.
