EchoVale NAS

This is a stock trading cost analysis app:
1. Helps users record and analyze various costs associated with stock trading, including explicit costs (handling fees, stamp duty, slippage) and implicit costs (time investment, opportunity cost, and psychological stress).
2. Key components: Main dashboard (displays an overview of key metrics), history records management (supports search and filtering), cost analysis (provides trend analysis), and adding new record (detailed form entry).
3. Cost analysis: includes average profit/cost calculation, cost breakdown chart, and trend analysis (slippage trends, cost percentage, transaction frequency, and profit trends).