A rules-based switch between leveraged Nasdaq exposure (QLD) and cash-like T‑bills (BIL): invest when the trend is up, during short rallies, or on deep dips; step aside when markets are overheated or in downtrends.

Daily check: If QQQ or SPY is extremely hot (RSI > 80), move to BIL, a cash‑like 1–3 month T‑bill fund. Else if SPY (the S&P 500 fund) is above its 200‑day average, hold QLD, a 2x daily Nasdaq‑100 fund. If SPY is below, still hold QLD during short rallies (above 25‑day avg) or deep dips (QQQ RSI < 30). Otherwise stay in BIL. RSI is a simple hot/cold gauge.

A rules-based, trend-following strategy that switches to Nasdaq leverage in uptrends and to cash-like Treasuries during heat or dips. Out-of-sample annualized return ~81% with a Calmar ~9.8, offering higher upside and disciplined risk control vs the S&P 500.