My market timing signals can be used to manage your 401K account, stocks or ETFs.  

Here is a trading strategy:

     Sell DXD and buy DDM when an "up" market timing signal is triggered.

     Sell DDM and buy DXD when a "down" market timing signal is triggered.  
  

Following the above simple strategy, I could make an impressive gain even during the bitter bear market period from November 2007 to March 2009.  Please see the actively updated performance table under "Market Timing Signals" tab in this website.