Both the Platform and REST API have a sophisticated logic layer to check the validity of raw data. This step is critical during upload, manual entry or API calls. An error (or warning) will occur when any of the following happens:
- Tickers with less than 100 days of daily adjusted closing prices (error)
- Tickers where daily adjusted closing prices have not been updated during the last week from the portfolio date
- Tickers where the volatility of the daily adjusted closing prices is zero (warning)
- Tickers where the most recent daily adjusted closing price is larger than 3-sigmas from the historical (warning)