How often would this strategy have been a better move than doing nothing at all based on the S&P 500?

Here's the strategy:

1) Buy in at any historical time you want and hold it until it drops 10% from the highest point it reaches after you buy in.

2) Sell all.

3) Buy back in when it increases 10% from the lowest point it reached after you sold it.

If you did this each time it occurred in the S&P 500, how many times would it have been a better move than doing nothing at all, in say like the last 40 years? Does anyone have any software or tool that can quickly answer that question?

What do y'all think about this strategy?

Submitted August 28, 2015 at 07:28PM by andleod http://ift.tt/1JrouII