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Documentation Index

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Release 06.05.2026 — v1.0
Market DataInstrument message has been renamed to InstrumentDefinition and redesigned:
  • New fields added: indexId, underlying, quantityAsset, priceAsset, minOrderQuantity
  • Removed fields: symbol, baseCurrency, quoteCurrency, baseIncrement, creationTime, logicalExpiry
  • Large tick size information is now represented as a repeating largeTickSizes group instead of flat fields
  • A new repeating legs group has been added to support combo instruments
New IndexDefinition message added, providing indexId and name for each index.Message ID changes:
  • TradingStatusUpdate has been removed and replaced by InstrumentStatusUpdate
  • InstrumentInfo and InstrumentRef have been renumbered
sortOrderId field added to Buy Put and Sell Put messages.TradeSummary message redesigned:
  • impliedVolatility field removed
  • tradeCount field added — indicates the number of Trade messages following the summary
  • takerFlags field renumbered
Order EntryNew CancelReason values:
  • PORTFOLIO_LOCKED — order cancelled because the portfolio is locked
  • POST_ONLY — post-only order would have crossed
New OrderRejectReason values:
  • PORTFOLIO_LOCKED — order rejected because the portfolio is locked
  • POSITION_LIMIT_EXCEEDED — future or options position size limit exceeded
  • ORDER_SIZE_LIMIT_EXCEEDED — open order aggregate size limit exceeded
New MassQuoteRejectReason value:
  • PORTFOLIO_LOCKED — mass quote rejected because the portfolio is locked