longbridge-execution-model Trade execution modelling framework for backtesting — slippage, VWAP/TWAP, market impact, and volume participation. Response language : match the user's input language — Simplified Chinese / Traditional Chinese / English. When to use Trigger on prompts asking for: - Slippage or market impact modelling — "帮我建一个滑点模型" , "square root market impact model" - VWAP / TWAP execution strategy — "VWAP执行逻辑" , "TWAP slice timing" - Volume participation rate (POV) — "成交量参与率策略" , "POV strategy" - Kyle lambda or price impact estimation — "Kyle lambda 估算" , "execution cost analysis"…