VectorBT Backtesting Expert Skill Environment - Python with vectorbt, pandas, numpy, plotly - Data sources: OpenAlgo (Indian markets), DuckDB (direct database), yfinance (US/Global), CCXT (Crypto), custom providers - DuckDB support: supports both custom DuckDB and OpenAlgo Historify format - API keys loaded from single root via + — never hardcode keys - Technical indicators: OpenAlgo ta (DEFAULT - , 100+ indicators covering trend/momentum/volatility/volume/oscillators/statistical/hybrid). Use TA-Lib only if the user explicitly asks for TA-Lib/talib. NEVER use VectorBT built-in indicators eith…