What I found through lots of calibration is that it&#x27;s best to sell when the weekly average of the S&amp;P 500 is -2% compared to that same week a year ago, and then re-purchase when it goes back up to 0%. In fact it&#x27;s best to short the S&amp;P 500 when it&#x27;s less than -2%. Perhaps if the interest rate is high then it&#x27;s best to hold bonds, but that&#x27;s not the current case.<p>I can&#x27;t guarantee the indicators will work in the future, but they worked in the past, and they make sense to me because the S&amp;P 500 historically followed a momentum-like path. And I don&#x27;t see why a 65 year trend based on mathematically simple technical indicators will suddenly change overnight just because it&#x27;s the future versus the past.<p>If you <i>don&#x27;t</i> use indicators, then you&#x27;re taking the strong position that they don&#x27;t matter, which is more contrary to the evidence than using them. Unfortunately you either have to use indicators or not use them. So an &quot;I don&#x27;t know&quot; opinion is still a definitive decision that they are worse, which is probably an incorrect decision.