Hello, I'm running an automated long/short US stock trend following system with a typical trade holding time of about of .5 days to a week. Lately, I've been agonizing over whether I should temporarily disable the system. On the one hand, I feel that the extraordinary market conditions are not at all represented in the data on which I used to train the system. Further, due to the financial short selling ban, many more than usual of the system's short signals are not getting filled. On the other hand, even though it has been a very volatile month, I am up slightly. Greed keeps me hoping that the market cycles will line up with my system and I'll get great results. Is anybody else facing this problem? Has anyone turned their system off with the expectation that they will turn it back on when the markets return to "normal."