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🎛️ API Reference — Enums (MT5)

This page lists key enumerations used by the MT5 C# SDK (mt5_term_api). Names match the .proto files; C# members are in PascalCase.

📊 Orders

TMT5_ENUM_ORDER_TYPE (OrderType)

Name Meaning
Tmt5OrderTypeBuy Market Buy
Tmt5OrderTypeSell Market Sell
Tmt5OrderTypeBuyLimit Pending Buy Limit
Tmt5OrderTypeSellLimit Pending Sell Limit
Tmt5OrderTypeBuyStop Pending Buy Stop
Tmt5OrderTypeSellStop Pending Sell Stop
Tmt5OrderTypeBuyStopLimit Pending Buy Stop Limit
Tmt5OrderTypeSellStopLimit Pending Sell Stop Limit

Alias / Usage: Used in OrderSendRequest.Operation, OpenedOrderInfo.Type, and related messages.

TMT5_ENUM_ORDER_TYPE_TIME (OrderTypeTime / TIF)

Name Meaning
Tmt5OrderTimeGtc Good Till Cancel
Tmt5OrderTimeDay Day (valid for the trading day)
Tmt5OrderTimeSpecified Good Till Date/Specified time
Tmt5OrderTimeSpecifiedDay Until end of specified day

Alias / Usage: Used in OrderSendRequest.ExpirationTimeType and OrderModifyRequest.ExpirationTimeType.

📈 Symbol & Market Info

SymbolInfoDoubleProperty (SymbolInfoDouble)

Name Meaning
SymbolVolumeMin Minimum allowed volume (lots)
SymbolVolumeMax Maximum allowed volume (lots)
SymbolVolumeStep Volume step (lots)

Alias / Usage: Queried via SymbolInfoDoubleAsync(symbol, property, ...) to validate order volume.

🔧 Order Modification

These enums are used when creating or modifying orders.

  • TMT5_ENUM_ORDER_TYPE — order kind (market / pending / stop‑limit).
  • TMT5_ENUM_ORDER_TYPE_TIME — Time‑in‑Force.

Common rules:

  • Buy Stop Limit requires Limit ≤ Stop.
  • Sell Stop Limit requires Limit ≥ Stop.
  • TIF Specified/GTD requires ExpirationTime.

🧭 Where They Appear (by message)

  • OrderSendRequest: Operation, ExpirationTimeType, ExpirationTime.
  • OrderModifyRequest: Ticket, Price, StopLimit, StopLoss, TakeProfit, ExpirationTimeType, ExpirationTime.
  • OpenedOrderInfo: Type, Ticket, Symbol, prices.
  • Market/Symbol: SymbolInfoDoubleProperty used by SymbolInfoDoubleAsync.

✅ Tips

  • Use enum names from generated C# (mt5_term_api) exactly as defined.
  • Validate volume using SymbolVolumeMin/Max/Step before sending orders.
  • When mapping user input, normalize to your canonical names (e.g., "buylimit" → Tmt5OrderTypeBuyLimit).
  • For TIF = Specified/SpecifiedDay, always set ExpirationTime.