A quantitative backtest framework comparing 5 strategies (BuyHold QQQ / Timing QQQ / Timing QLD / Timing TQQQ / Combo 60-30-10) using QQQ SMA200 as market regime signal with dip-based DCA entry. 基于QQQ SMA200牛熊择时，对比五种策略（买入持有/QQQ择时/QLD择时/TQQQ择时/60-30-10混合组合）的量化回测框架，支持分批回调建仓。
Testfolio-compatible synthetic leveraged-ETF return series for Python, with proper borrow-cost modeling. Calibrated against real TQQQ to within 5%.
Transparent Bitcoin risk-management model based on SMA50, SMA200, RSI and volume analysis. Includes dashboard, Telegram bot and historical backtesting.
CrossTide — Cross-platform stock SMA crossover monitor (Flutter). Detects SMA50/SMA150/SMA200 crossovers & Golden Cross. Free Yahoo Finance data. Android + Windows.
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