Angela - I think your 5/15 SMA tool is good for Bull markets, but may be dangerous in a Bear market. The high volatility is the problem ...if the market suddenly plunges for a day and then does a moonshot the next day you can find yourself on the wrong side of the trade (and it could be expensive).
This is similar to the problems with the MACD ...which is a similar tool. By the time the crossover occurs the market has often moved on (like last week ...both directions).
The Case Against Leveraged ETFs [View article]
This is similar to the problems with the MACD ...which is a similar tool. By the time the crossover occurs the market has often moved on (like last week ...both directions).