I have come to the conclusion that there are some mechanical systems that perform very well in a bull market. That said, those same systems have thus far failed miserably during this bear. I think these "systems" are OK if the individual investor keeps and eye on the big picture and takes an active role in disconnecting the program as it were when things look bad on a LT weekly like November. The monthly chart can be a handy tool as well in these cases.
I signed up for such a program in mid December and was up big out of the box, but when I see the signal caller going 100% long in a 2X leveraged fund, it was wake up call. I pulled some of the funds from that account. When I saw said signal caller go 100% long again on 12/27, I pulled the plug. So much for set it and forget it investing. Ditto on TMG I guess.