Some of the Ratio/Indicator charts NFTRH uses, reflecting market indications & internals (more to be added over time)

Live ratio charts using various ETFs to gauge internal market indications
Gold/Silver Ratio (GLD/SLV): A “metallic credit spread” within the precious metals (theory: liquidity stress when rising, ample liquidity when declining.
Gold/SPX Ratio (GLD/SPY): A counter-cyclical metal vs. a cyclical market (theory: Macro liquidity and risk when rising, long-term (expand chart’s time duration for a big picture view).
Silver/SPX Ratio (SLV/SPY): More volatile, inflation-sensitive PM vs. the stock market (theory: I don’t really have one ;-))
Gold/Copper Ratio (GLD/CPER): A counter-cyclical metals vs. a very cyclical one (theory: monetary vs. industrial metal)
Gold/WTI Oil Ratio (GLD/USO): Gold miner product vs. mining cost input (theory: positive fundamental for gold mining operations’ bottom lines/counter-cyclical indication when rising)
Gold/RINF Ratio (GLD/RINF): Gold vs. “inflation expectations” (theory: disinflationary macro when rising, positive for gold mining fundamentals)
IWF/IWD Ratio: Growth vs. Value stocks (theory: risk-on when rising, risk-off when declining)
XLV/SPY Ratio: Healthcare vs. broad market (theory: risk-on when declining, risk-off when rising)
NDX/SPX Ratio (QQQ/SPY): Big Tech vs. Broad US Market (theory: Tech leadership usually bullish)
GDX/Gold Ratio (GDX/GLD): Gold miners vs. their product (theory: positive market internal when rising)