A simple daily switcher: usually hold VT (global stocks). In hot uptrends it briefly flips to UVXY (volatility) if 3× stock funds look stretched; in weak trends it may shift to TLT (long Treasuries) if tech lags. Uses long‑term trend and short‑term “heat” rules.

1) Check trend: Is SPY (US large stocks) above its 200‑day average price? Yes = uptrend. Uptrend: If TQQQ or SPXL (3× stock funds) show extreme short‑term “heat” >~80, hold UVXY (a fear/volatility fund that jumps when stocks wobble). Otherwise hold VT (total world stocks). Downtrend: If heat is very low (<~30), hold VT. Else if TQQQ is below its 20‑day average, hold TLT (long US Treasuries); else VT. “Heat” = a 0–100 recent‑moves score. “Average” = past‑N‑day mean. Leveraged funds act as thermometers.

In out-of-sample tests, this strategy posts ~31.5% annualized return vs ~19.4% for the S&P 500, higher Sharpe (~1.75 vs ~1.0), and much lower drawdown (9.5% vs 16.6%), plus Calmar ~3.33—providing bigger upside with less risk.