> ## Documentation Index > Fetch the complete documentation index at: https://v3.docs.derive.xyz/llms.txt > Use this file to discover all available pages before exploring further. # Ticker slim > Channel name: `ticker_slim.{instrument_name}.{interval}`. Public channel that streams a lightweight ticker (prices and key stats) for an instrument, where {instrument_name} is the market and {interval} is the update cadence in milliseconds (100 or 1000). ## AsyncAPI ````yaml subscriptions.asyncapi.json tickerSlim id: tickerSlim title: Ticker slim description: >- Channel name: `ticker_slim.{instrument_name}.{interval}`. Public channel that streams a lightweight ticker (prices and key stats) for an instrument, where {instrument_name} is the market and {interval} is the update cadence in milliseconds (100 or 1000). servers: - id: production protocol: wss host: api.derive.xyz bindings: [] variables: [] - id: testnet protocol: wss host: testnet.api.derive.xyz bindings: [] variables: [] address: /v3/ws parameters: [] bindings: [] operations: - &ref_7 id: receive_tickerSlim title: Receive_ticker slim type: send messages: - &ref_10 id: tickerSlimNotification payload: - name: tickerSlimNotification type: object properties: - name: instrument_ticker type: object required: true properties: - name: A type: string description: >- Amount of contracts / tokens available at the best ask price. required: true - name: B type: string description: >- Amount of contracts / tokens available at the best bid price. required: true - name: I type: string description: Index price. required: true - name: M type: string description: Mark price. required: true - name: a type: string description: Best ask price. required: true - name: b type: string description: Best bid price. required: true - name: f type: &ref_0 - string - 'null' description: >- Current hourly funding rate (perpetuals only; `null` otherwise). required: false - name: maxp type: string description: >- Maximum price at which an aggressive buyer can be matched. Any portion of a market order that would execute above this price is cancelled. A limit buy order with limit price above this value is treated as post only (i.e. it is rejected if it would cross any existing resting order). required: true - name: minp type: string description: >- Minimum price at which an aggressive seller can be matched. Any portion of a market order that would execute below this price is cancelled. A limit sell order with limit price below this value is treated as post only (i.e. it is rejected if it would cross any existing resting order). required: true - name: option_pricing type: object description: >- Option greeks and implied vols (options only; `null` otherwise). required: false properties: - name: ai type: string description: Implied volatility of the current best ask. required: true - name: bi type: string description: Implied volatility of the current best bid. required: true - name: d type: string description: Delta of the option. required: true - name: df type: string description: Discount factor used to calculate the option premium. required: true - name: f type: string description: Forward price used to calculate the option premium. required: true - name: g type: string description: Gamma of the option. required: true - name: i type: string description: Implied volatility of the option. required: true - name: m type: string description: Mark price of the option. required: true - name: r type: string description: Rho of the option. required: true - name: t type: string description: Theta of the option. required: true - name: v type: string description: Vega of the option. required: true - name: stats type: object required: true properties: - name: c type: string description: Number of contracts traded during last 24 hours required: true - name: h type: string description: Highest trade price during last 24h required: true - name: l type: string description: Lowest trade price during last 24h required: true - name: 'n' type: integer description: Number of trades during last 24h required: true - name: oi type: string description: Current total open interest required: true - name: p type: string description: >- Options: 24hr percent change in premium; Perps: 24hr percent change in mark price required: true - name: pr type: string description: Premium volume traded during last 24 hours required: true - name: v type: string description: Notional volume traded during last 24 hours required: true - name: t type: integer description: >- Snapshot creation timestamp, in milliseconds since the Unix epoch. required: true - name: timestamp type: integer required: true headers: [] jsonPayloadSchema: description: Payload for `ticker_slim.{instrument}.{interval}`. type: object required: - instrument_ticker - timestamp properties: instrument_ticker: type: object required: - A - B - I - M - a - b - maxp - minp - stats - t properties: A: description: >- Amount of contracts / tokens available at the best ask price. type: string x-parser-schema-id: B: description: >- Amount of contracts / tokens available at the best bid price. type: string x-parser-schema-id: I: description: Index price. type: string x-parser-schema-id: M: description: Mark price. type: string x-parser-schema-id: a: description: Best ask price. type: string x-parser-schema-id: b: description: Best bid price. type: string x-parser-schema-id: f: description: >- Current hourly funding rate (perpetuals only; `null` otherwise). type: *ref_0 x-parser-schema-id: maxp: description: >- Maximum price at which an aggressive buyer can be matched. Any portion of a market order that would execute above this price is cancelled. A limit buy order with limit price above this value is treated as post only (i.e. it is rejected if it would cross any existing resting order). type: string x-parser-schema-id: minp: description: >- Minimum price at which an aggressive seller can be matched. Any portion of a market order that would execute below this price is cancelled. A limit sell order with limit price below this value is treated as post only (i.e. it is rejected if it would cross any existing resting order). type: string x-parser-schema-id: option_pricing: description: >- Option greeks and implied vols (options only; `null` otherwise). anyOf: - type: object required: - ai - bi - d - df - f - g - i - m - r - t - v properties: ai: description: Implied volatility of the current best ask. type: string x-parser-schema-id: bi: description: Implied volatility of the current best bid. type: string x-parser-schema-id: d: description: Delta of the option. type: string x-parser-schema-id: df: description: >- Discount factor used to calculate the option premium. type: string x-parser-schema-id: f: description: Forward price used to calculate the option premium. type: string x-parser-schema-id: g: description: Gamma of the option. type: string x-parser-schema-id: i: description: Implied volatility of the option. type: string x-parser-schema-id: m: description: Mark price of the option. type: string x-parser-schema-id: r: description: Rho of the option. type: string x-parser-schema-id: t: description: Theta of the option. type: string x-parser-schema-id: v: description: Vega of the option. type: string x-parser-schema-id: x-parser-schema-id: OptionPricing - type: 'null' x-parser-schema-id: x-parser-schema-id: stats: type: object required: - c - h - l - 'n' - oi - p - pr - v properties: c: description: Number of contracts traded during last 24 hours type: string format: decimal x-parser-schema-id: h: description: Highest trade price during last 24h type: string format: decimal x-parser-schema-id: l: description: Lowest trade price during last 24h type: string format: decimal x-parser-schema-id: 'n': description: Number of trades during last 24h type: integer format: uint64 minimum: 0 x-parser-schema-id: oi: description: Current total open interest type: string format: decimal x-parser-schema-id: p: description: >- Options: 24hr percent change in premium; Perps: 24hr percent change in mark price type: string format: decimal x-parser-schema-id: pr: description: Premium volume traded during last 24 hours type: string format: decimal x-parser-schema-id: v: description: Notional volume traded during last 24 hours type: string format: decimal x-parser-schema-id: x-parser-schema-id: DailyTradingStatistics t: description: >- Snapshot creation timestamp, in milliseconds since the Unix epoch. type: integer format: int64 x-parser-schema-id: x-parser-schema-id: TickerSlimSnapshot timestamp: type: integer format: int64 x-parser-schema-id: x-parser-schema-id: TickerSlimPayload title: Ticker slim notification example: No examples found bindings: [] extensions: - id: x-parser-unique-object-id value: tickerSlimNotification bindings: [] extensions: &ref_5 - id: x-parser-unique-object-id value: tickerSlim - &ref_6 id: send_subscribe_tickerSlim title: Send_subscribe_ticker slim type: receive messages: - &ref_8 id: subscribeRequest payload: - name: subscribeRequest description: >- Send to subscribe: list this channel's address (with the {param} segments filled, e.g. orderbook.ETH-PERP.10.20) in params.channels. type: object properties: - name: headers type: &ref_1 - object - 'null' description: Non-standard; used by `auth/login`. required: false - name: id type: anyOf required: true - name: method type: string description: subscribe required: true - name: params type: object description: >- Params for `subscribe`. `channels` is the required list of channel names to subscribe to. required: true properties: - name: channels type: array required: true properties: - name: item type: string required: false headers: [] jsonPayloadSchema: type: object required: - id - method - params properties: headers: description: Non-standard; used by `auth/login`. type: *ref_1 additionalProperties: true x-parser-schema-id: id: &ref_3 anyOf: - type: string x-parser-schema-id: - type: number x-parser-schema-id: - type: 'null' x-parser-schema-id: x-parser-schema-id: JsonRpcId method: type: string const: subscribe x-parser-schema-id: params: description: >- Params for `subscribe`. `channels` is the required list of channel names to subscribe to. type: object required: - channels properties: channels: type: array items: type: string x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: SubscribeParams x-parser-schema-id: title: Subscribe request description: >- Send to subscribe: list this channel's address (with the {param} segments filled, e.g. orderbook.ETH-PERP.10.20) in params.channels. example: |- { "id": 1, "method": "subscribe", "params": { "channels": [ "orderbook.ETH-PERP.10.20" ] } } bindings: [] extensions: - id: x-parser-unique-object-id value: subscribeRequest - &ref_9 id: unsubscribeRequest payload: - name: unsubscribeRequest description: >- Send to unsubscribe: list the channel addresses to drop in params.channels, or omit it to unsubscribe from everything. type: object properties: - name: headers type: &ref_2 - object - 'null' description: Non-standard; used by `auth/login`. required: false - name: id type: anyOf required: true - name: method type: string description: unsubscribe required: true - name: params type: object description: >- Params for `unsubscribe`. `channels` is optional. When omitted (or null) the connection unsubscribes from all channels. required: true properties: - name: channels type: &ref_4 - array - 'null' required: false headers: [] jsonPayloadSchema: type: object required: - id - method - params properties: headers: description: Non-standard; used by `auth/login`. type: *ref_2 additionalProperties: true x-parser-schema-id: id: *ref_3 method: type: string const: unsubscribe x-parser-schema-id: params: description: >- Params for `unsubscribe`. `channels` is optional. When omitted (or null) the connection unsubscribes from all channels. type: object properties: channels: default: null type: *ref_4 items: type: string x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: UnsubscribeParams x-parser-schema-id: title: Unsubscribe request description: >- Send to unsubscribe: list the channel addresses to drop in params.channels, or omit it to unsubscribe from everything. example: |- { "method": "", "params": {} } bindings: [] extensions: - id: x-parser-unique-object-id value: unsubscribeRequest bindings: [] extensions: *ref_5 sendOperations: - *ref_6 receiveOperations: - *ref_7 sendMessages: - *ref_8 - *ref_9 receiveMessages: - *ref_10 extensions: - id: x-parser-unique-object-id value: tickerSlim securitySchemes: [] ```` ## Related topics - [Get the ticker for one instrument](/api-reference/market-data/get-the-ticker-for-one-instrument.md) - [Subscriptions](/subscriptions.md) - [Migration skill for your coding agent](/migrating/breaking-changes.md)