I try not to time the market. Usually doesn't work out. My company uses a firm call "The Mutual Fund Store". They monitor the investments for me and adjust based on their knowledge of the market. They only get paid a small percentage of my investments value as a management fee. They make more money, if I make more money.
However, if you don't have someone knowledgeable helping to manage your investments, now might be a time to move to some less risky investments.