> ## Documentation Index > Fetch the complete documentation index at: https://docs.amberdata.io/llms.txt > Use this file to discover all available pages before exploring further. # Monthly versus Daily Volatility Ratio > This endpoint returns the relationship/comparison of Parkinson realized volatility calculation using one monthly calculation versus 30 daily calculations. The reasons these calculations might differ is due to mean-reversion, intra-month volatility and trending markets. ## OpenAPI ````yaml get /analytics/realized-volatility/monthly-vs-daily-ratio openapi: 3.1.0 info: title: derivatives-api version: '2' servers: - url: https://api.amberdata.com/markets/derivatives security: - sec0: [] paths: /analytics/realized-volatility/monthly-vs-daily-ratio: get: summary: Monthly versus Daily Volatility Ratio description: >- This endpoint returns the relationship/comparison of Parkinson realized volatility calculation using one monthly calculation versus 30 daily calculations. The reasons these calculations might differ is due to mean-reversion, intra-month volatility and trending markets. operationId: derivatives-realized-volatility-monthly-daily-ratio parameters: - name: exchange in: query description: >- **[Required]** The exchange for which to retrieve the volatility cone. **[Examples]** `gdax` required: true schema: type: string default: gdax - name: pair in: query description: >- **[Required]** The underlying pair for which to retrieve the volatility cone. **[Examples]** `btc_usd` required: true schema: type: string default: btc_usd - name: timeFormat in: query description: >- **[Optional]** Time format of the timestamps in the return payload. **[Defaults]** `milliseconds | ms* | iso | iso8601 | hr | human_readable` schema: type: string responses: '200': description: '200' content: application/json: schema: type: object properties: status: type: integer example: 200 title: type: string example: OK description: type: string example: Successful request payload: type: object properties: data: type: array items: type: object properties: timestamp: type: integer example: 1717113600000 description: >- The timestamp for the volatility ratio data point in milliseconds monthlyHigh: type: number example: 71980 description: The monthly high price for the trading pair monthlyLow: type: number example: 56500 description: The monthly low price for the trading pair dailyOpen: type: number example: 68338.58 description: The daily opening price for the trading pair dailyHigh: type: number example: 69024.71 description: The daily high price for the trading pair dailyLow: type: number example: 66584.47 description: The daily low price for the trading pair dailyClose: type: number example: 67472.41 description: The daily closing price for the trading pair monthlyHistoricalVolatility: type: number example: 50.3764986312911 description: >- The monthly historical volatility calculated using Parkinson method dailyHistoricalVolatility30Days: type: number example: 44.724266426706855 description: >- The 30-day historical volatility calculated using daily data and Parkinson method examples: Result: value: status: 200 title: OK description: Successful request payload: data: - timestamp: 1717113600000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 68338.58 dailyHigh: 69024.71 dailyLow: 66584.47 dailyClose: 67472.41 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 44.724266426706855 - timestamp: 1717027200000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 67569.44 dailyHigh: 69536.89 dailyLow: 67092.91 dailyClose: 68338.58 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.66868139849072 - timestamp: 1716940800000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 68321.99 dailyHigh: 68864.11 dailyLow: 67081.66 dailyClose: 67569.45 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.563226687535305 - timestamp: 1716854400000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 69366.31 dailyHigh: 69533.96 dailyLow: 67194.59 dailyClose: 68321.98 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.9562324420313 - timestamp: 1716768000000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 68470.8 dailyHigh: 70613.39 dailyLow: 68210.12 dailyClose: 69368.72 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.70074496173833 - timestamp: 1716681600000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 69289.69 dailyHigh: 69522 dailyLow: 68097.38 dailyClose: 68473.72 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.405537150028884 - timestamp: 1716595200000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 68545.52 dailyHigh: 69605.03 dailyLow: 68487.44 dailyClose: 69289.67 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.46990787338427 - timestamp: 1716508800000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 67932.79 dailyHigh: 69278.75 dailyLow: 66587.91 dailyClose: 68547.8 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 47.08589841634579 - timestamp: 1716422400000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 69109.93 dailyHigh: 70066.95 dailyLow: 66259 dailyClose: 67940.45 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 46.45863315887012 - timestamp: 1716336000000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 70142.88 dailyHigh: 70659.99 dailyLow: 68887.52 dailyClose: 69109.93 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 45.06156764942955 - timestamp: 1716249600000 monthlyHigh: 71980 monthlyLow: 56500 dailyOpen: 71432.16 dailyHigh: 71980 dailyLow: 69146.01 dailyClose: 70142.84 monthlyHistoricalVolatility: 50.3764986312911 dailyHistoricalVolatility30Days: 45.59409947695456 '400': description: '400' content: application/json: examples: Result: value: {} schema: type: object properties: {} deprecated: false security: - ApiKeyAuth: [] components: securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key ````