> ## 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. # Depth > Percentage depth profiles offer insights into the order book structure and available liquidity at different price levels. By analyzing buy and sell liquidity within a specified percentage range from the best-bid/best-ask, traders can assess liquidity distribution and its impact on market behavior. The order book depth endpoint returns liquidity data in percentage-based tranches, measured in basis points, at 1-minute intervals. If no date range is specified, the most recent 24 hours of data will be returned. ## OpenAPI ````yaml get /depth openapi: 3.1.0 info: title: spot-analytics version: '2' servers: - url: https://api.amberdata.com/markets/spot/analytics security: - sec0: [] paths: /depth: get: summary: Depth description: >- Percentage depth profiles offer insights into the order book structure and available liquidity at different price levels. By analyzing buy and sell liquidity within a specified percentage range from the best-bid/best-ask, traders can assess liquidity distribution and its impact on market behavior. The order book depth endpoint returns liquidity data in percentage-based tranches, measured in basis points, at 1-minute intervals. If no date range is specified, the most recent 24 hours of data will be returned. operationId: spot-analytics-order-book-depth parameters: - name: exchange in: query description: >- **[Required]** The select exchange for which to view liquidity depth. **[Examples]** ` gdax | okex | binance | binanceus` required: true schema: type: string default: gdax - name: pair in: query description: |- **[Required]** The currency pair for which to view liquidity depth. **[Examples]** ` btc_usd | btc_usdc | eth_usd ` required: true schema: type: string default: btc_usd - name: startDate in: query description: >- **[Optional]** Payload only includes data after this date (inclusive). **[Formats]** `seconds | milliseconds | iso8601` **[Examples]** `1578531600 | 1578531600000 | 2025-02-27` schema: type: string - name: endDate in: query description: >- **[Optional]** Payload only includes data up to this date (exclusive). **[Formats]** `seconds | milliseconds | iso8601` **[Examples]** `1578531600 | 1578531600000 | 2025-02-28` schema: type: string - 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 default: hr 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: basisPoints005: type: number example: 6.830253600000002 description: Depth at 5 basis points from BBO basisPoints005OrderCount: type: integer example: 60 description: Number of orders at 5 basis points depth basisPoints005UsdMillion: type: number example: 0.564816653987364 description: USD value in millions at 5 basis points depth bestAskPrice: type: number example: 82695.55 description: The best ask price in the order book bestBidPrice: type: number example: 82691.18 description: The best bid price in the order book exchange: type: string example: gdax description: The exchange where the depth data is from midPrice: type: number example: 82693.36499999999 description: The mid-price between best bid and ask pair: type: string example: btc_usd description: The trading pair for the depth data side: type: string example: ask description: The side of the order book (ask or bid) spreadPercent: type: number example: 0.005284583593871039 description: The spread percentage between best bid and ask timestamp: type: integer example: 1742342400000 description: >- The timestamp for the depth data point in milliseconds examples: Result: value: status: 200 title: OK description: Successful request payload: data: - basisPoints005: 6.830253600000002 basisPoints005OrderCount: 60 basisPoints005UsdMillion: 0.564816653987364 basisPoints010: 29.522870730000008 basisPoints010OrderCount: 111 basisPoints010UsdMillion: 2.441345525123707 basisPoints015: 44.98593633999999 basisPoints015OrderCount: 150 basisPoints015UsdMillion: 3.7200384536303828 basisPoints020: 63.778317060000006 basisPoints020OrderCount: 192 basisPoints020UsdMillion: 5.274043651728307 basisPoints025: 85.55252507000004 basisPoints025OrderCount: 228 basisPoints025UsdMillion: 7.074626182285163 basisPoints050: 122.20367462999992 basisPoints050OrderCount: 336 basisPoints050UsdMillion: 10.105433070519823 basisPoints075: 157.26895277999978 basisPoints075OrderCount: 457 basisPoints075UsdMillion: 13.005098915404284 basisPoints100: 173.7872608699996 basisPoints100OrderCount: 571 basisPoints100UsdMillion: 14.371053395473094 basisPoints125: 176.1600231899997 basisPoints125OrderCount: 680 basisPoints125UsdMillion: 14.567265096059106 basisPoints150: 189.4091800699996 basisPoints150OrderCount: 801 basisPoints150UsdMillion: 15.6628824618792 basisPoints175: 207.83888358999965 basisPoints175OrderCount: 921 basisPoints175UsdMillion: 17.18689666190035 basisPoints200: 228.8633147599998 basisPoints200OrderCount: 1033 basisPoints200UsdMillion: 18.92547762255855 basisPoints225: 275.7434367699998 basisPoints225OrderCount: 1167 basisPoints225UsdMillion: 22.80215266317601 basisPoints250: 318.46661659999984 basisPoints250OrderCount: 1287 basisPoints250UsdMillion: 26.335076166818844 basisPoints275: 324.02097659999987 basisPoints275OrderCount: 1430 basisPoints275UsdMillion: 26.794384885640245 basisPoints300: 363.1769934100001 basisPoints300OrderCount: 1617 basisPoints300UsdMillion: 30.032327675655726 basisPoints325: 372.98405825000043 basisPoints325OrderCount: 1820 basisPoints325UsdMillion: 30.843306868048543 basisPoints350: 384.7937300700006 basisPoints350OrderCount: 2019 basisPoints350UsdMillion: 31.819888370390032 basisPoints375: 402.4399919800007 basisPoints375OrderCount: 2204 basisPoints375UsdMillion: 33.27911714739926 basisPoints400: 431.12956241000063 basisPoints400OrderCount: 2388 basisPoints400UsdMillion: 35.65155426666046 basisPoints425: 434.9075431700006 basisPoints425OrderCount: 2539 basisPoints425UsdMillion: 35.96396820861012 basisPoints450: 441.3240401900004 basisPoints450OrderCount: 2694 basisPoints450UsdMillion: 36.49456993870637 basisPoints475: 447.6692832100005 basisPoints475OrderCount: 2832 basisPoints475UsdMillion: 37.019279435772944 basisPoints500: 450.29508528000065 basisPoints500OrderCount: 2972 basisPoints500UsdMillion: 37.23641584476522 bestAskPrice: 82695.55 bestBidPrice: 82691.18 exchange: gdax midPrice: 82693.36499999999 pair: btc_usd side: ask spreadPercent: 0.005284583593871039 timestamp: 1742342400000 '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 ````