ENUMs Usage Reference - All Methods

Complete reference for ENUM usage across all GoMT5 API methods

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📊 Summary Statistics

Method Group	With ENUMs	Total	Percentage
Account Information	4	4	100% ✅
Symbol Information	7	14	50%
Positions & Orders	3	5	60%
Market Depth/DOM	1	3	33%
Trading Operations	6	6	100% ✅
Streaming Methods	3	5	60%
TOTAL	24	37	65%

---

1. Account Information (4 methods)

✅ All methods use ENUMs

Method	ENUMs Count	Description	Input ENUMs	Output ENUMs
AccountSummary	[In: 0, Out: 1] Total: 1 ENUM	Get all account data in one call (RECOMMENDED)	-	MrpcEnumAccountTradeMode (3 values) - Account type (DEMO/CONTEST/REAL)
AccountInfoDouble	[In: 1, Out: 0] Total: 1 ENUM	Get double properties (Balance, Equity, Margin, etc.)	AccountInfoDoublePropertyType (14 values) - Property selector	-
AccountInfoInteger	[In: 1, Out: 0] Total: 1 ENUM	Get integer properties (Login, Leverage, etc.)	AccountInfoIntegerPropertyType (11 values) - Property selector	⚠️ Returns int64 values that may represent ENUMs (e.g., ACCOUNT_TRADE_MODE: 0=DEMO, 1=CONTEST, 2=REAL)
AccountInfoString	[In: 1, Out: 0] Total: 1 ENUM	Get string properties (Currency, Company, etc.)	AccountInfoStringPropertyType (4 values) - Property selector	-

---

2. Symbol Information (14 methods)

7 methods use ENUMs

Method	ENUMs Count	Description	Input ENUMs	Output ENUMs
SymbolsTotal	[In: 0, Out: 0] Total: 0 ENUMs	Count total/selected symbols	-	-
SymbolExist	[In: 0, Out: 0] Total: 0 ENUMs	Check if symbol exists	-	-
SymbolName	[In: 0, Out: 0] Total: 0 ENUMs	Get symbol name by index	-	-
SymbolSelect	[In: 0, Out: 0] Total: 0 ENUMs	Add/remove symbol from Market Watch	-	-
SymbolIsSynchronized	[In: 0, Out: 0] Total: 0 ENUMs	Check sync status with server	-	-
SymbolInfoDouble	[In: 1, Out: 0] Total: 1 ENUM	Get double properties (Bid, Ask, Point, Volume, etc.)	SymbolInfoDoubleProperty (60 values) - Property selector	-
SymbolInfoInteger	[In: 1, Out: 0] Total: 1 ENUM	Get integer properties (Digits, Spread, Stops Level)	SymbolInfoIntegerProperty (37 values) - Property selector	⚠️ Returns int64 values that may represent ENUMs: BMT5_ENUM_SYMBOL_TRADE_MODE, BMT5_ENUM_SYMBOL_TRADE_EXECUTION, BMT5_ENUM_SYMBOL_CALC_MODE, BMT5_ENUM_SYMBOL_SWAP_MODE, BMT5_ENUM_SYMBOL_ORDER_GTC_MODE, BMT5_ENUM_SYMBOL_OPTION_RIGHT, BMT5_ENUM_SYMBOL_CHART_MODE, BMT5_ENUM_SYMBOL_SECTOR, BMT5_ENUM_SYMBOL_INDUSTRY
SymbolInfoString	[In: 1, Out: 0] Total: 1 ENUM	Get string properties (Description, Base/Profit Currency)	SymbolInfoStringProperty (15 values) - Property selector	-
SymbolInfoMarginRate	[In: 1, Out: 0] Total: 1 ENUM	Get margin requirements for order types	ENUM_ORDER_TYPE (9 values) - Order type for margin calculation	-
SymbolInfoTick	[In: 0, Out: 0] Total: 0 ENUMs	Get last tick data with timestamp	-	-
SymbolInfoSessionQuote	[In: 1, Out: 0] Total: 1 ENUM	Get quote session times	DayOfWeek (7 values) - Day of week	-
SymbolInfoSessionTrade	[In: 1, Out: 0] Total: 1 ENUM	Get trade session times	DayOfWeek (7 values) - Day of week	-
SymbolParamsMany	[In: 1, Out: 0] Total: 1 ENUM	Get detailed parameters for multiple symbols	AH_SYMBOL_PARAMS_MANY_SORT_TYPE (4 values) - Sort mode	-
TickValueWithSize	[In: 0, Out: 0] Total: 0 ENUMs	Get tick value and size information for symbols	-	-

---

3. Positions & Orders Information (5 methods)

3 methods use ENUMs

Method	ENUMs Count	Description	Input ENUMs	Output ENUMs
PositionsTotal	[In: 0, Out: 0] Total: 0 ENUMs	Count open positions	-	-
OpenedOrders	[In: 1, Out: 6] Total: 7 ENUMs	Get all opened orders & positions with full details	BMT5_ENUM_OPENED_ORDER_SORT_TYPE (4 values) - Sort mode	6 ENUMs: In PositionInfo: BMT5_ENUM_POSITION_TYPE, BMT5_ENUM_POSITION_REASON In OpenedOrderInfo: BMT5_ENUM_ORDER_TYPE, BMT5_ENUM_ORDER_STATE, BMT5_ENUM_ORDER_TYPE_TIME, BMT5_ENUM_ORDER_TYPE_FILLING
OpenedOrdersTickets	[In: 0, Out: 0] Total: 0 ENUMs	Get only ticket numbers (lightweight)	-	-
OrderHistory	[In: 1, Out: 7] Total: 8 ENUMs	Get historical orders with pagination	BMT5_ENUM_ORDER_HISTORY_SORT_TYPE (6 values) - Sort mode	7 ENUMs: In OrderHistoryData: BMT5_ENUM_ORDER_STATE, BMT5_ENUM_ORDER_TYPE, BMT5_ENUM_ORDER_TYPE_TIME, BMT5_ENUM_ORDER_TYPE_FILLING In DealHistoryData: BMT5_ENUM_DEAL_ENTRY_TYPE, BMT5_ENUM_DEAL_TYPE, BMT5_ENUM_DEAL_REASON
PositionsHistory	[In: 1, Out: 1] Total: 2 ENUMs	Get historical positions with P&L	AH_ENUM_POSITIONS_HISTORY_SORT_TYPE (4 values) - Sort mode	AH_ENUM_POSITIONS_HISTORY_ORDER_TYPE (9 values) - Order type in PositionHistoryInfo

---

4. Market Depth / DOM (3 methods)

1 method uses ENUMs

Method	ENUMs Count	Description	Input ENUMs	Output ENUMs
MarketBookAdd	[In: 0, Out: 0] Total: 0 ENUMs	Subscribe to Depth of Market updates	-	-
MarketBookRelease	[In: 0, Out: 0] Total: 0 ENUMs	Unsubscribe from DOM	-	-
MarketBookGet	[In: 0, Out: 1] Total: 1 ENUM	Get current market depth snapshot	-	BookType (4 values) - Order type in order book (BOOK_TYPE_SELL, BOOK_TYPE_BUY, BOOK_TYPE_SELL_MARKET, BOOK_TYPE_BUY_MARKET)

---

5. Trading Operations (6 methods)

✅ All methods use ENUMs

Method	ENUMs Count	Description	Input ENUMs	Output ENUMs
OrderSend	[In: 2, Out: 0] Total: 2 ENUMs	Send market or pending order	TMT5_ENUM_ORDER_TYPE (9 values) - Order type TMT5_ENUM_ORDER_TYPE_TIME (4 values) - Order lifetime	-
OrderModify	[In: 1, Out: 0] Total: 1 ENUM	Modify existing order parameters	TMT5_ENUM_ORDER_TYPE_TIME (4 values) - Order lifetime (ExpirationTimeType field)	-
OrderClose	[In: 0, Out: 1] Total: 1 ENUM	Close market or pending order	-	MRPC_ORDER_CLOSE_MODE (3 values) - Close mode: MRPC_MARKET_ORDER_CLOSE, MRPC_MARKET_ORDER_PARTIAL_CLOSE, MRPC_PENDING_ORDER_REMOVE
OrderCheck	[In: 4, Out: 0] Total: 4 ENUMs	Validate order before sending	MRPC_ENUM_TRADE_REQUEST_ACTIONS (6 values) - Trade action ENUM_ORDER_TYPE_TF (9 values) - Order type MRPC_ENUM_ORDER_TYPE_FILLING (4 values) - Fill mode MRPC_ENUM_ORDER_TYPE_TIME (4 values) - Order lifetime	-
OrderCalcMargin	[In: 1, Out: 0] Total: 1 ENUM	Calculate required margin	ENUM_ORDER_TYPE_TF (9 values) - Order type	-
OrderCalcProfit	[In: 1, Out: 0] Total: 1 ENUM	Calculate potential profit/loss	ENUM_ORDER_TYPE_TF (9 values) - Order type	-

---

6. Streaming Methods (5 methods)

✅ 3/5 methods use ENUMs (60%)

Method	ENUMs Count	Description	Input ENUMs	Output ENUMs
OnSymbolTick	[In: 0, Out: 0] Total: 0 ENUMs	Stream tick data (Bid/Ask updates)	-	-
OnTrade	[In: 0, Out: 11] Total: 11 ENUMs	Stream trade events (positions, orders, deals)	-	11 ENUMs (1 direct, 10 nested): Direct ENUM (1): 1. MT5_SUB_ENUM_EVENT_GROUP_TYPE (OnTradeData.Type) - 2 values Nested ENUMs (10): 2. SUB_ENUM_POSITION_TYPE (OnTradePositionInfo) 3. SUB_ENUM_POSITION_REASON (OnTradePositionInfo) 4. SUB_ENUM_ORDER_TYPE (OnTradeOrderInfo, OnTradeHistoryOrderInfo) 5. SUB_ENUM_ORDER_STATE (OnTradeOrderInfo, OnTradeHistoryOrderInfo) 6. SUB_ENUM_ORDER_TYPE_TIME (OnTradeOrderInfo, OnTradeHistoryOrderInfo) 7. SUB_ENUM_ORDER_TYPE_FILLING (OnTradeOrderInfo, OnTradeHistoryOrderInfo) 8. SUB_ENUM_ORDER_REASON (OnTradeOrderInfo) 9. SUB_ENUM_DEAL_TYPE (OnTradeHistoryDealInfo) 10. SUB_ENUM_DEAL_ENTRY (OnTradeHistoryDealInfo) 11. SUB_ENUM_DEAL_REASON (OnTradeHistoryDealInfo, OnTradeHistoryOrderInfo)
OnPositionProfit	[In: 0, Out: 1] Total: 1 ENUM	Stream position P&L updates	-	MT5_SUB_ENUM_EVENT_GROUP_TYPE (2 values) - Event type (OnPositionProfitData.Type)
OnPositionsAndPendingOrdersTickets	[In: 0, Out: 0] Total: 0 ENUMs	Stream ticket changes	-	-
OnTradeTransaction	[In: 0, Out: 9] Total: 9 ENUMs (11 field uses)	Stream trade transaction events	-	9 ENUMs (1 direct, 8 nested): Direct ENUM (1): 1. MT5_SUB_ENUM_EVENT_GROUP_TYPE (OnTradeTransactionData.Type) Nested ENUMs (8): 2. SUB_ENUM_TRADE_TRANSACTION_TYPE (MqlTradeTransaction.Type) 3. SUB_ENUM_ORDER_TYPE (×2: MqlTradeTransaction.OrderType, MqlTradeRequest.OrderType) 4. SUB_ENUM_ORDER_STATE (MqlTradeTransaction.OrderState) 5. SUB_ENUM_DEAL_TYPE (MqlTradeTransaction.DealType) 6. SUB_ENUM_ORDER_TYPE_TIME (×2: MqlTradeTransaction.OrderTimeType, MqlTradeRequest.TypeTime) 7. SUB_ENUM_TRADE_REQUEST_ACTIONS (MqlTradeRequest.TradeOperationType) 8. SUB_ENUM_ORDER_TYPE_FILLING (MqlTradeRequest.OrderTypeFilling) 9. MqlErrorTradeCode (MqlTradeResult.TradeReturnCode)

---

🔧 Code Usage Examples

1. Account Information

// AccountSummary - Output ENUM
summary, _ := account.AccountSummary(ctx, &pb.AccountSummaryRequest{})
switch summary.AccountTradeMode {
case pb.MrpcEnumAccountTradeMode_MRPC_ACCOUNT_TRADE_MODE_DEMO:
    fmt.Println("Demo account")
case pb.MrpcEnumAccountTradeMode_MRPC_ACCOUNT_TRADE_MODE_REAL:
    fmt.Println("Real account")
}

// AccountInfoDouble - Input ENUM
req := &pb.AccountInfoDoubleRequest{
    PropertyId: pb.AccountInfoDoublePropertyType_ACCOUNT_BALANCE,
}
data, _ := account.AccountInfoDouble(ctx, req)
fmt.Printf("Balance: %.2f\n", data.RequestedValue)

2. Trading Operations

// OrderSend - Input ENUMs
req := &pb.OrderSendRequest{
    Symbol:    "EURUSD",
    Volume:    0.01,
    OrderType: pb.TMT5_ENUM_ORDER_TYPE_TMT5_ORDER_TYPE_BUY,
    TypeTime:  pb.TMT5_ENUM_ORDER_TYPE_TIME_TMT5_ORDER_TIME_GTC,
}
result, _ := account.OrderSend(ctx, req)

// OrderModify - Input ENUM
modifyReq := &pb.OrderModifyRequest{
    Ticket:             ticket,
    StopLoss:           &newSL,
    ExpirationTimeType: pb.TMT5_ENUM_ORDER_TYPE_TIME_TMT5_ORDER_TIME_DAY,
}
modifyResult, _ := account.OrderModify(ctx, modifyReq)

// OrderClose - Output ENUM
closeResult, _ := account.OrderClose(ctx, closeReq)
switch closeResult.CloseMode {
case pb.MRPC_ORDER_CLOSE_MODE_MRPC_MARKET_ORDER_CLOSE:
    fmt.Println("Market order closed")
case pb.MRPC_ORDER_CLOSE_MODE_MRPC_PENDING_ORDER_REMOVE:
    fmt.Println("Pending order removed")
}

3. Symbol Information

// SymbolInfoSessionQuote - Input ENUM
req := &pb.SymbolInfoSessionQuoteRequest{
    Symbol:    "EURUSD",
    DayOfWeek: pb.BMT5_ENUM_DAY_OF_WEEK_BMT5_MONDAY,
}
sessionData, _ := account.SymbolInfoSessionQuote(ctx, req)

4. Positions & Orders

// OpenedOrders - Input ENUM
req := &pb.OpenedOrdersRequest{
    SortType: pb.BMT5_ENUM_OPENED_ORDER_SORT_TYPE_SORT_BY_TICKET_ASC,
}
orders, _ := account.OpenedOrders(ctx, req)

// PositionsHistory - Input ENUM
histReq := &pb.PositionsHistoryRequest{
    SortType: pb.AH_ENUM_POSITIONS_HISTORY_SORT_TYPE_AH_POSITION_OPEN_TIME_DESC,
}
history, _ := account.PositionsHistory(ctx, histReq)

// Check Output ENUM in result
for _, pos := range history.HistoryPositions {
    switch pos.OrderType {
    case pb.AH_ENUM_POSITIONS_HISTORY_ORDER_TYPE_AH_ORDER_TYPE_BUY:
        fmt.Println("Buy position")
    case pb.AH_ENUM_POSITIONS_HISTORY_ORDER_TYPE_AH_ORDER_TYPE_SELL:
        fmt.Println("Sell position")
    }
}

5. Market Depth / DOM

// MarketBookGet - Output ENUM
req := &pb.MarketBookGetRequest{
    Symbol: "EURUSD",
}
bookData, _ := account.MarketBookGet(ctx, req)

// Check order types in the book
for _, bookInfo := range bookData.MqlBookInfos {
    switch bookInfo.Type {
    case pb.BookType_BOOK_TYPE_SELL:
        fmt.Printf("Sell order: Price=%.5f, Volume=%d\n", bookInfo.Price, bookInfo.Volume)
    case pb.BookType_BOOK_TYPE_BUY:
        fmt.Printf("Buy order: Price=%.5f, Volume=%d\n", bookInfo.Price, bookInfo.Volume)
    case pb.BookType_BOOK_TYPE_SELL_MARKET:
        fmt.Printf("Market sell: Price=%.5f, Volume=%d\n", bookInfo.Price, bookInfo.Volume)
    case pb.BookType_BOOK_TYPE_BUY_MARKET:
        fmt.Printf("Market buy: Price=%.5f, Volume=%d\n", bookInfo.Price, bookInfo.Volume)
    }
}

6. Streaming Methods

// OnTrade - Output ENUMs (11 unique types in nested structures)
dataChan, errChan := account.OnTrade(ctx, &pb.OnTradeRequest{})
go func() {
    for event := range dataChan {
        // Check top-level event type
        switch event.Type {
        case pb.MT5_SUB_ENUM_EVENT_GROUP_TYPE_OrderUpdate:
            fmt.Println("Trade event received")

            // Process positions (uses SUB_ENUM_POSITION_TYPE, SUB_ENUM_POSITION_REASON)
            for _, pos := range event.EventData.NewPositions {
                switch pos.Type {
                case pb.SUB_ENUM_POSITION_TYPE_SUB_POSITION_TYPE_BUY:
                    fmt.Printf("New BUY position #%d\n", pos.Ticket)
                case pb.SUB_ENUM_POSITION_TYPE_SUB_POSITION_TYPE_SELL:
                    fmt.Printf("New SELL position #%d\n", pos.Ticket)
                }
            }

            // Process orders (uses SUB_ENUM_ORDER_TYPE, SUB_ENUM_ORDER_STATE, etc.)
            for _, order := range event.EventData.NewOrders {
                switch order.State {
                case pb.SUB_ENUM_ORDER_STATE_SUB_ORDER_STATE_PLACED:
                    fmt.Printf("Order #%d placed\n", order.Ticket)
                case pb.SUB_ENUM_ORDER_STATE_SUB_ORDER_STATE_FILLED:
                    fmt.Printf("Order #%d filled\n", order.Ticket)
                }
            }

            // Process deals (uses SUB_ENUM_DEAL_TYPE, SUB_ENUM_DEAL_ENTRY, SUB_ENUM_DEAL_REASON)
            for _, deal := range event.EventData.NewHistoryDeals {
                switch deal.Type {
                case pb.SUB_ENUM_DEAL_TYPE_SUB_DEAL_TYPE_BUY:
                    fmt.Printf("Buy deal #%d\n", deal.Ticket)
                case pb.SUB_ENUM_DEAL_TYPE_SUB_DEAL_TYPE_SELL:
                    fmt.Printf("Sell deal #%d\n", deal.Ticket)
                }
            }
        }
    }
}()

// OnPositionProfit - Output ENUM
profitChan, profitErrChan := account.OnPositionProfit(ctx, &pb.OnPositionProfitRequest{
    TimerPeriodMilliseconds: 1000,
    IgnoreEmptyData:         true,
})
go func() {
    for event := range profitChan {
        // Check event type (same ENUM as OnTrade)
        switch event.Type {
        case pb.MT5_SUB_ENUM_EVENT_GROUP_TYPE_OrderProfit:
            fmt.Printf("Position profit updates: %d new, %d updated, %d deleted\n",
                len(event.NewPositions),
                len(event.UpdatedPositions),
                len(event.DeletedPositions))
        }
    }
}()

// OnTradeTransaction - Output ENUMs (9 unique types, 11 uses)
txChan, txErrChan := account.OnTradeTransaction(ctx, &pb.OnTradeTransactionRequest{})
go func() {
    for tx := range txChan {
        // ENUM #1: MT5_SUB_ENUM_EVENT_GROUP_TYPE
        switch tx.Type {
        case pb.MT5_SUB_ENUM_EVENT_GROUP_TYPE_TradeTransaction:
            fmt.Println("Trade transaction event")
        }

        // ENUM #2-6: In MqlTradeTransaction
        if tx.TradeTransaction != nil {
            switch tx.TradeTransaction.Type {
            case pb.SUB_ENUM_TRADE_TRANSACTION_TYPE_TRADE_TRANSACTION_ORDER_ADD:
                fmt.Println("Order added")
            case pb.SUB_ENUM_TRADE_TRANSACTION_TYPE_TRADE_TRANSACTION_DEAL_ADD:
                fmt.Println("Deal added")
            }

            switch tx.TradeTransaction.OrderType {
            case pb.SUB_ENUM_ORDER_TYPE_ORDER_TYPE_BUY:
                fmt.Println("Buy order")
            case pb.SUB_ENUM_ORDER_TYPE_ORDER_TYPE_SELL:
                fmt.Println("Sell order")
            }

            switch tx.TradeTransaction.OrderState {
            case pb.SUB_ENUM_ORDER_STATE_ORDER_STATE_STARTED:
                fmt.Println("Order started")
            case pb.SUB_ENUM_ORDER_STATE_ORDER_STATE_FILLED:
                fmt.Println("Order filled")
            }

            switch tx.TradeTransaction.DealType {
            case pb.SUB_ENUM_DEAL_TYPE_DEAL_TYPE_BUY:
                fmt.Println("Buy deal")
            case pb.SUB_ENUM_DEAL_TYPE_DEAL_TYPE_SELL:
                fmt.Println("Sell deal")
            }

            switch tx.TradeTransaction.OrderTimeType {
            case pb.SUB_ENUM_ORDER_TYPE_TIME_ORDER_TIME_GTC:
                fmt.Println("Good Till Cancel")
            }
        }

        // ENUM #7-8: In MqlTradeRequest
        if tx.TradeRequest != nil {
            switch tx.TradeRequest.TradeOperationType {
            case pb.SUB_ENUM_TRADE_REQUEST_ACTIONS_TRADE_ACTION_DEAL:
                fmt.Println("Deal action")
            case pb.SUB_ENUM_TRADE_REQUEST_ACTIONS_TRADE_ACTION_PENDING:
                fmt.Println("Pending order action")
            }

            switch tx.TradeRequest.OrderTypeFilling {
            case pb.SUB_ENUM_ORDER_TYPE_FILLING_ORDER_FILLING_FOK:
                fmt.Println("Fill or Kill")
            case pb.SUB_ENUM_ORDER_TYPE_FILLING_ORDER_FILLING_IOC:
                fmt.Println("Immediate or Cancel")
            }
        }

        // ENUM #9: In MqlTradeResult
        if tx.TradeResult != nil {
            switch tx.TradeResult.TradeReturnCode {
            case pb.MqlErrorTradeCode_TRADE_RETCODE_DONE:
                fmt.Println("Trade successful")
            case pb.MqlErrorTradeCode_TRADE_RETCODE_REJECT:
                fmt.Println("Trade rejected")
            }
        }
    }
}()

---

📝 Important Notes

🔴 Full Name Required in Go

In Go, you MUST write the full ENUM name with prefix:

✅ Correct:

pb.AccountInfoDoublePropertyType_ACCOUNT_BALANCE
pb.TMT5_ENUM_ORDER_TYPE_TMT5_ORDER_TYPE_BUY
pb.MrpcEnumAccountTradeMode_MRPC_ACCOUNT_TRADE_MODE_DEMO

❌ Incorrect (won't compile):

ACCOUNT_BALANCE           // error: undefined
ORDER_TYPE_BUY           // error: undefined
ACCOUNT_TRADE_MODE_DEMO  // error: undefined

🔴 Full Name Format

pb.<ENUM_TYPE>_<CONSTANT_NAME>
│   │            │
│   │            └─ Constant name
│   └─ ENUM type
└─ Package prefix

⚠️ Special Cases

1. AccountInfoInteger and SymbolInfoInteger:

• Some properties return values that represent ENUMs, but are returned as int64
• These are NOT typed ENUMs, just numbers!
• You need to manually compare with known values

2. PositionsHistory:

• Does NOT return Deal ENUMs (BMT5_ENUM_DEAL_TYPE, BMT5_ENUM_DEAL_REASON, BMT5_ENUM_DEAL_ENTRY_TYPE)
• Returns only POSITION information, not deals
• Input ENUM: AH_ENUM_POSITIONS_HISTORY_SORT_TYPE (4 values: OPEN_TIME_ASC/DESC, TICKET_ASC/DESC)
• Output ENUM: AH_ENUM_POSITIONS_HISTORY_ORDER_TYPE (9 values, includes CLOSE_BY)

3. OrderModify:

• Uses Input ENUM for ExpirationTimeType
• Does NOT use ENUMs in response (only ReturnedCode as uint32)

4. ReturnedCode:

• ReturnedCode field in all trading operations is NOT an ENUM
• It's a plain uint32 operation return code
• See RETURN_CODES_REFERENCE.md for code list

5. Streaming Methods - OnPositionProfit:

• OnPositionProfit USES Output ENUM: MT5_SUB_ENUM_EVENT_GROUP_TYPE (in Type field of OnPositionProfitData structure)
• This same ENUM is used in OnTrade and OnTradeTransaction
• Represents event type in stream (OrderProfit, OrderPlaced, OrderModified, TradeTransaction, etc.)

6. OnTrade - most complex streaming method:

• Uses 11 unique ENUM types in nested structures (more than OnTradeTransaction!):
• OnTradeData.Type - MT5_SUB_ENUM_EVENT_GROUP_TYPE (top-level event type)
• OnTradePositionInfo (in NewPositions, DisappearedPositions, UpdatedPositions) - 2 ENUMs:
  • SUB_ENUM_POSITION_TYPE, SUB_ENUM_POSITION_REASON
• OnTradeOrderInfo (in NewOrders, DisappearedOrders, StateChangedOrders) - 5 ENUMs:
  • SUB_ENUM_ORDER_TYPE, SUB_ENUM_ORDER_STATE, SUB_ENUM_ORDER_TYPE_TIME, SUB_ENUM_ORDER_TYPE_FILLING, SUB_ENUM_ORDER_REASON
• OnTradeHistoryOrderInfo (in NewHistoryOrders, DisappearedHistoryOrders, UpdatedHistoryOrders) - 5 ENUMs:
  • SUB_ENUM_ORDER_TYPE, SUB_ENUM_ORDER_STATE, SUB_ENUM_ORDER_TYPE_TIME, SUB_ENUM_ORDER_TYPE_FILLING, SUB_ENUM_DEAL_REASON (note: DEAL_REASON, not ORDER_REASON!)
• OnTradeHistoryDealInfo (in NewHistoryDeals, DisappearedHistoryDeals, UpdatedHistoryDeals) - 3 ENUMs:
  • SUB_ENUM_DEAL_TYPE, SUB_ENUM_DEAL_ENTRY, SUB_ENUM_DEAL_REASON
• Many ENUM types are reused across different structures
• Important: Always check event.Type == MT5_SUB_ENUM_EVENT_GROUP_TYPE_OrderUpdate (not OnTrade!)

7. OnTradeTransaction - second most complex:

• Uses 11 fields with ENUMs (9 unique types) in four nested structures:
• OnTradeTransactionData.Type - MT5_SUB_ENUM_EVENT_GROUP_TYPE
• MqlTradeTransaction - 5 ENUMs (Type, OrderType, OrderState, DealType, OrderTimeType)
• MqlTradeRequest - 4 ENUMs (TradeOperationType, OrderType, OrderTypeFilling, TypeTime)
• MqlTradeResult.TradeReturnCode - MqlErrorTradeCode
• Some ENUM types are reused in different structures (SUB_ENUM_ORDER_TYPE, SUB_ENUM_ORDER_TYPE_TIME)

8. Methods with Multiple Nested ENUMs:

• OnTrade uses 11 unique ENUM types (most complex!)
• OnTradeTransaction uses 9 unique ENUM types (11 field uses)
• OrderHistory returns 7 different ENUMs (4 in OrderHistoryData + 3 in DealHistoryData)
• OpenedOrders returns 6 different ENUMs (3 in PositionInfo + 3 in OpenedOrderInfo)

---

🔗 See Also

Documentation by Group:

• Account Information Overview
• Symbol Information Overview
• Positions & Orders Overview
• Market Depth Overview
• Trading Operations Overview

Other References:

• Return Codes Reference - trading operation return codes
• Error Handling Guide - error handling