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Coming soon: order placement over WebSocket becomes available on September 2, 2026, on the global platform only. The EU platform is not yet supported.
Place a margin or futures limit order priced from the current best bid or offer. The role semantics match the spot order_bbo_place method, and the same ordinary limit order comes back.

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Rate limits

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Place margin BBO order

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Request parameters

The bbo_role parameter decides which side of the spread supplies the price.

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Response

The response is an ordinary margin limit order reporting type 7 — no BBO marker survives placement. The price field records where the order landed. See the order object reference.
No re-pegging happens. The price is resolved once, at placement, and the order then behaves like any other resting limit order as the order book moves away from it.

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Error codes

Standard transport errors and the shared account, rate-limit, and region codes are listed in Order Management.