# Data Dictionary - Crypto Realized Volatility (Hyperliquid universe) - close-to-close, downside & Parkinson, daily Parquet

**Units:** vary by `metric` - read the per-row `unit` column (overall: annualized % (vol)).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Coin |
| `ts` | timestamp (UTC) | Day |
| `metric` | str | realized_vol_30d / realized_vol_90d / downside_vol_30d / parkinson_vol_30d |
| `value` | float | Annualized volatility (%) |
| `unit` | str | unit |
| `res_min` | int | Native resolution (daily = 1440) |

*Source: Hyperliquid (on-chain perpetual DEX) - public asset-context data.*