IB.reqMarketDataType

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reqMarketDataType(self, marketDataType: int)

Completeness: fully-documented · Canonical ID: ib_async.ib.IB.reqMarketDataType

Explicit policy override after evidence-backed documentation review.

Related API navigation

• Calls: Client.reqMarketDataType
• Protocol mapping: EClient.reqMarketDataType
• Response callback: EWrapper.marketDataType
• Error reference: TWS message codes (applicability is request-dependent).

Sources and provenance

• ib-async-repository-2-1-0 (library-source; retrieved 2026-07-15T03:42:42Z)
• ib-async-repository-2-1-0 (library-source; retrieved 2026-07-15T03:42:42Z)
• ibkr-campus-tws-api (official-current; retrieved 2026-07-14T19:13:54.602937Z)

Set the market data type used for .reqMktData.

Args: marketDataType: One of:

• 1 = Live
• 2 = Frozen
• 3 = Delayed
• 4 = Delayed frozen

https://interactivebrokers.github.io/tws-api/market_data_type.html