This is a group of ETF based on market timing. The market timing models are based on an if-then market timing rule that if satisfied points to a single "bullish" ETF and if violated, points to a single "bearish" ETF. Users are encourage to use these as jumping-off points for their own experimentation. You can change the timing rule(s) embedded in the if-then logic. Also, you can change the ETFs that would be used under bullish or bearish conditions. If you would like to point to a group of ETFs, rather than an individual ETF, based on market conditions, go to My123 and input the tickers of your choice into user created lists. then, modify the screen by using the InList function instead of ticker. In other words, instead of Ticker("SPY") as a bullish choice, you might substitute InList("My_Bullish_List").