backtest

Generate complete VectorBT backtesting scripts with data fetch, signals, stats, and plots. Create a complete VectorBT backtest script for the user. Parse $ARGUMENTS as: strategy symbol exchange interval If no arguments, ask the user which strategy they want. /backtest ema-crossover RELIANCE NSE D /backtest rsi SBIN /backtest supertrend NIFTY NFO 5m - Supports 10+ pre-built strategies (EMA crossover, RSI, Donchian, Supertrend, MACD, SDA2, momentum, and more) with template-based script generation - Fetches data from OpenAlgo API or loads directly from DuckDB; auto-detects Historify vs custom formats - Uses TA-Lib for standard indicators and OpenAlgo ta for specialty indicators (Supertrend, Donchian, Ichimoku); includes signal deduplication via exrem() - Generates portfolio stats, strategy vs NIFTY benchmark comparison table, QuantStats HTML tearsheet, Plotly equity/drawdown charts, and CSV trade exports - Handles Indian delivery fees (0.111% + ₹20 fixed) and F&O lot-size constraints (NIFTY 65, BANKNIFTY 30) - $0 = strategy name (e.g., ema-crossover, rsi, donchian, supertrend, macd, sda2, momentum) - $1 = symbol (e.g., SBIN, RELIANCE, NIFTY). Default: SBIN - $2 = exchange (e.g., NSE, NFO). Default: NSE - $3 = interval (e.g., D, 1h, 5m). Default: D - Read the vectorbt-expert skill rules for reference patterns - Create backtesting/{strategy_name}/ directory if it doesn't exist...