Silver and Stocks

Below are two daily trend charts of Silver (SLV) and Stocks (SPY).  My interpretation is that these two markets are highly correlated, with SPY turning in a much smoother trend profile. 

SLV Daily

SPY Daily

That said, a longer term application of the low-volatility algorithm to Hecla (HL) shows stellar results:

HL Weekly 4.0 Trend Model