The above chart is the SPX/Gold vs Gold and SPX. When the relationship is bullish stocks tend to be the #1 performer, when the indicator is bearish, gold appears to be the #1 performer. You could use this relationship on a 1M candle and elaborate it further by adding SPY/NASDAQ/BTC/IWM/VTI on the bullish side and USD/TLT/XLU/GLD on the bearish side. Following this system going backward would have proven to be market outperformance on a risk-adjusted level.