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Language Basics
- Syntax
- Data Types
- Operations and Expressions
- Operators
- Functions
- Variables
- Preprocessor
- Object-Oriented Programming
- Namespaces
Constants, Enumerations and Structures
- Chart Constants
- Objects Constants
- Indicator Constants
- Environment State
- Trade Constants
- Named Constants
- Data Structures
- Codes of Errors and Warnings
- Input/Output Constants
MQL5 programs
- Program Running
- Trade Permission
- Client Terminal Events
- Resources
- Call of Imported Functions
- Runtime Errors
- Testing Trading Strategies
Predefined Variables
- _AppliedTo
- _Digits
- _Point
- _LastError
- _Period
- _RandomSeed
- _StopFlag
- _Symbol
- _UninitReason
- _IsX64
Common Functions
- Alert
- CheckPointer
- Comment
- CryptEncode
- CryptDecode
- DebugBreak
- ExpertRemove
- GetPointer
- GetTickCount
- GetTickCount64
- GetMicrosecondCount
- MessageBox
- PeriodSeconds
- PlaySound
- Print
- PrintFormat
- ResetLastError
- ResourceCreate
- ResourceFree
- ResourceReadImage
- ResourceSave
- SetReturnError
- SetUserError
- Sleep
- TerminalClose
- TesterHideIndicators
- TesterStatistics
- TesterStop
- TesterDeposit
- TesterWithdrawal
- TranslateKey
- ZeroMemory
Array Functions
- ArrayBsearch
- ArrayCopy
- ArrayCompare
- ArrayFree
- ArrayGetAsSeries
- ArrayInitialize
- ArrayFill
- ArrayIsDynamic
- ArrayIsSeries
- ArrayMaximum
- ArrayMinimum
- ArrayPrint
- ArrayRange
- ArrayResize
- ArrayInsert
- ArrayRemove
- ArrayReverse
- ArraySetAsSeries
- ArraySize
- ArraySort
- ArraySwap
- ArrayToFP16
- ArrayToFP8
- ArrayFromFP16
- ArrayFromFP8
Matrix and Vector Methods
- Matrix and Vector Types
- Initialization
- Manipulations
- Operations
- Products
- Transformations
- Statistics
- Features
- Solutions
- Machine learning
- OpenBLAS
Conversion Functions
- CharToString
- CharArrayToString
- CharArrayToStruct
- StructToCharArray
- ColorToARGB
- ColorToString
- DoubleToString
- EnumToString
- IntegerToString
- ShortToString
- ShortArrayToString
- TimeToString
- NormalizeDouble
- StringToCharArray
- StringToColor
- StringToDouble
- StringToInteger
- StringToShortArray
- StringToTime
- StringFormat
Math Functions
- MathAbs
- MathArccos
- MathArcsin
- MathArctan
- MathArctan2
- MathClassify
- MathCeil
- MathCos
- MathExp
- MathFloor
- MathLog
- MathLog10
- MathMax
- MathMin
- MathMod
- MathPow
- MathRand
- MathRound
- MathSin
- MathSqrt
- MathSrand
- MathTan
- MathIsValidNumber
- MathExpm1
- MathLog1p
- MathArccosh
- MathArcsinh
- MathArctanh
- MathCosh
- MathSinh
- MathTanh
- MathSwap
String Functions
- StringAdd
- StringBufferLen
- StringCompare
- StringConcatenate
- StringFill
- StringFind
- StringGetCharacter
- StringInit
- StringLen
- StringSetLength
- StringReplace
- StringReserve
- StringSetCharacter
- StringSplit
- StringSubstr
- StringToLower
- StringToUpper
- StringTrimLeft
- StringTrimRight
Date and Time
- TimeCurrent
- TimeTradeServer
- TimeLocal
- TimeGMT
- TimeDaylightSavings
- TimeGMTOffset
- TimeToStruct
- StructToTime
Account Information
- AccountInfoDouble
- AccountInfoInteger
- AccountInfoString
Checkup
- GetLastError
- IsStopped
- UninitializeReason
- TerminalInfoInteger
- TerminalInfoDouble
- TerminalInfoString
- MQLInfoInteger
- MQLInfoString
- Symbol
- Period
- Digits
- Point
Event Handling
- OnStart
- OnInit
- OnDeinit
- OnTick
- OnCalculate
- OnTimer
- OnTrade
- OnTradeTransaction
- OnBookEvent
- OnChartEvent
- OnTester
- OnTesterInit
- OnTesterDeinit
- OnTesterPass
Market Info
- SymbolsTotal
- SymbolExist
- SymbolName
- SymbolSelect
- SymbolIsSynchronized
- SymbolInfoDouble
- SymbolInfoInteger
- SymbolInfoString
- SymbolInfoMarginRate
- SymbolInfoTick
- SymbolInfoSessionQuote
- SymbolInfoSessionTrade
- MarketBookAdd
- MarketBookRelease
- MarketBookGet
Economic Calendar
- CalendarCountryById
- CalendarEventById
- CalendarValueById
- CalendarCountries
- CalendarEventByCountry
- CalendarEventByCurrency
- CalendarValueHistoryByEvent
- CalendarValueHistory
- CalendarValueLastByEvent
- CalendarValueLast
Timeseries and Indicators Access
- Indexing Direction in Arrays, Buffers and Timeseries
- Organizing Data Access
- SeriesInfoInteger
- Bars
- BarsCalculated
- IndicatorCreate
- IndicatorParameters
- IndicatorRelease
- CopyBuffer
- CopyRates
- CopySeries
- CopyTime
- CopyOpen
- CopyHigh
- CopyLow
- CopyClose
- CopyTickVolume
- CopyRealVolume
- CopySpread
- CopyTicks
- CopyTicksRange
- iBars
- iBarShift
- iClose
- iHigh
- iHighest
- iLow
- iLowest
- iOpen
- iTime
- iTickVolume
- iRealVolume
- iVolume
- iSpread
Custom Symbols
- CustomSymbolCreate
- CustomSymbolDelete
- CustomSymbolSetInteger
- CustomSymbolSetDouble
- CustomSymbolSetString
- CustomSymbolSetMarginRate
- CustomSymbolSetSessionQuote
- CustomSymbolSetSessionTrade
- CustomRatesDelete
- CustomRatesReplace
- CustomRatesUpdate
- CustomTicksAdd
- CustomTicksDelete
- CustomTicksReplace
- CustomBookAdd
Chart Operations
- ChartApplyTemplate
- ChartSaveTemplate
- ChartWindowFind
- ChartTimePriceToXY
- ChartXYToTimePrice
- ChartOpen
- ChartFirst
- ChartNext
- ChartClose
- ChartSymbol
- ChartPeriod
- ChartRedraw
- ChartSetDouble
- ChartSetInteger
- ChartSetString
- ChartGetDouble
- ChartGetInteger
- ChartGetString
- ChartNavigate
- ChartID
- ChartIndicatorAdd
- ChartIndicatorDelete
- ChartIndicatorGet
- ChartIndicatorName
- ChartIndicatorsTotal
- ChartWindowOnDropped
- ChartPriceOnDropped
- ChartTimeOnDropped
- ChartXOnDropped
- ChartYOnDropped
- ChartSetSymbolPeriod
- ChartScreenShot
Trade Functions
- OrderCalcMargin
- OrderCalcProfit
- OrderCheck
- OrderSend
- OrderSendAsync
- PositionsTotal
- PositionGetSymbol
- PositionSelect
- PositionSelectByTicket
- PositionGetDouble
- PositionGetInteger
- PositionGetString
- PositionGetTicket
- OrdersTotal
- OrderGetTicket
- OrderSelect
- OrderGetDouble
- OrderGetInteger
- OrderGetString
- HistorySelect
- HistorySelectByPosition
- HistoryOrderSelect
- HistoryOrdersTotal
- HistoryOrderGetTicket
- HistoryOrderGetDouble
- HistoryOrderGetInteger
- HistoryOrderGetString
- HistoryDealSelect
- HistoryDealsTotal
- HistoryDealGetTicket
- HistoryDealGetDouble
- HistoryDealGetInteger
- HistoryDealGetString
Trade Signals
- SignalBaseGetDouble
- SignalBaseGetInteger
- SignalBaseGetString
- SignalBaseSelect
- SignalBaseTotal
- SignalInfoGetDouble
- SignalInfoGetInteger
- SignalInfoGetString
- SignalInfoSetDouble
- SignalInfoSetInteger
- SignalSubscribe
- SignalUnSubscribe
Network Functions
- SocketCreate
- SocketClose
- SocketConnect
- SocketIsConnected
- SocketIsReadable
- SocketIsWritable
- SocketTimeouts
- SocketRead
- SocketSend
- SocketTlsHandshake
- SocketTlsCertificate
- SocketTlsRead
- SocketTlsReadAvailable
- SocketTlsSend
- WebRequest
- SendFTP
- SendMail
- SendNotification
Global Variables of the Terminal
- GlobalVariableCheck
- GlobalVariableTime
- GlobalVariableDel
- GlobalVariableGet
- GlobalVariableName
- GlobalVariableSet
- GlobalVariablesFlush
- GlobalVariableTemp
- GlobalVariableSetOnCondition
- GlobalVariablesDeleteAll
- GlobalVariablesTotal
File Functions
- FileSelectDialog
- FileFindFirst
- FileFindNext
- FileFindClose
- FileIsExist
- FileOpen
- FileClose
- FileCopy
- FileDelete
- FileMove
- FileFlush
- FileGetInteger
- FileIsEnding
- FileIsLineEnding
- FileReadArray
- FileReadBool
- FileReadDatetime
- FileReadDouble
- FileReadFloat
- FileReadInteger
- FileReadLong
- FileReadNumber
- FileReadString
- FileReadStruct
- FileSeek
- FileSize
- FileTell
- FileWrite
- FileWriteArray
- FileWriteDouble
- FileWriteFloat
- FileWriteInteger
- FileWriteLong
- FileWriteString
- FileWriteStruct
- FileLoad
- FileSave
- FolderCreate
- FolderDelete
- FolderClean
Custom Indicators
- Indicator Styles in Examples
- Connection between Indicator Properties and Functions
- SetIndexBuffer
- IndicatorSetDouble
- IndicatorSetInteger
- IndicatorSetString
- PlotIndexSetDouble
- PlotIndexSetInteger
- PlotIndexSetString
- PlotIndexGetInteger
Object Functions
- ObjectCreate
- ObjectName
- ObjectDelete
- ObjectsDeleteAll
- ObjectFind
- ObjectGetTimeByValue
- ObjectGetValueByTime
- ObjectMove
- ObjectsTotal
- ObjectSetDouble
- ObjectSetInteger
- ObjectSetString
- ObjectGetDouble
- ObjectGetInteger
- ObjectGetString
- TextSetFont
- TextOut
- TextGetSize
Technical Indicators
- iAC
- iAD
- iADX
- iADXWilder
- iAlligator
- iAMA
- iAO
- iATR
- iBearsPower
- iBands
- iBullsPower
- iCCI
- iChaikin
- iCustom
- iDEMA
- iDeMarker
- iEnvelopes
- iForce
- iFractals
- iFrAMA
- iGator
- iIchimoku
- iBWMFI
- iMomentum
- iMFI
- iMA
- iOsMA
- iMACD
- iOBV
- iSAR
- iRSI
- iRVI
- iStdDev
- iStochastic
- iTEMA
- iTriX
- iWPR
- iVIDyA
- iVolumes
Working with Optimization Results
- FrameFirst
- FrameFilter
- FrameNext
- FrameInputs
- FrameAdd
- ParameterGetRange
- ParameterSetRange
Working with Events
- EventSetMillisecondTimer
- EventSetTimer
- EventKillTimer
- EventChartCustom
Working with OpenCL
- CLHandleType
- CLGetInfoInteger
- CLGetInfoString
- CLContextCreate
- CLContextFree
- CLGetDeviceInfo
- CLProgramCreate
- CLProgramFree
- CLKernelCreate
- CLKernelFree
- CLSetKernelArg
- CLSetKernelArgMem
- CLSetKernelArgMemLocal
- CLBufferCreate
- CLBufferFree
- CLBufferWrite
- CLBufferRead
- CLExecute
- CLExecutionStatus
Working with databases
- DatabaseOpen
- DatabaseClose
- DatabaseImport
- DatabaseExport
- DatabasePrint
- DatabaseTableExists
- DatabaseExecute
- DatabasePrepare
- DatabaseReset
- DatabaseBind
- DatabaseBindArray
- DatabaseRead
- DatabaseReadBind
- DatabaseFinalize
- DatabaseTransactionBegin
- DatabaseTransactionCommit
- DatabaseTransactionRollback
- DatabaseColumnsCount
- DatabaseColumnName
- DatabaseColumnType
- DatabaseColumnSize
- DatabaseColumnText
- DatabaseColumnInteger
- DatabaseColumnLong
- DatabaseColumnDouble
- DatabaseColumnBlob
Working with DirectX
- DXContextCreate
- DXContextSetSize
- DXContextGetSize
- DXContextClearColors
- DXContextClearDepth
- DXContextGetColors
- DXContextGetDepth
- DXBufferCreate
- DXTextureCreate
- DXInputCreate
- DXInputSet
- DXShaderCreate
- DXShaderSetLayout
- DXShaderInputsSet
- DXShaderTexturesSet
- DXDraw
- DXDrawIndexed
- DXPrimiveTopologySet
- DXBufferSet
- DXShaderSet
- DXHandleType
- DXRelease
Python Integration
- initialize
- login
- shutdown
- version
- last_error
- account_info
- terminal_info
- symbols_total
- symbols_get
- symbol_info
- symbol_info_tick
- symbol_select
- market_book_add
- market_book_get
- market_book_release
- copy_rates_from
- copy_rates_from_pos
- copy_rates_range
- copy_ticks_from
- copy_ticks_range
- orders_total
- orders_get
- order_calc_margin
- order_calc_profit
- order_check
- order_send
- positions_total
- positions_get
- history_orders_total
- history_orders_get
- history_deals_total
- history_deals_get
ONNX models
- ONNX Support
- Format Conversion
- Automatic data type conversion
- Creating a Model
- Running a model
- Validation in the Strategy Tester
- OnnxCreate
- OnnxCreateFromBuffer
- OnnxRelease
- OnnxRun
- OnnxGetInputCount
- OnnxGetOutputCount
- OnnxGetInputName
- OnnxGetOutputName
- OnnxGetInputTypeInfo
- OnnxGetOutputTypeInfo
- OnnxSetInputShape
- OnnxSetOutputShape
- Data structures
Standard Library
- Mathematics
- OpenCL
- Basic Class CObject
- Data Collections
- Generic Data Collections
- Files
- Strings
- Graphic Objects
- Custom Graphics
- 3D Graphics
- Price Charts
- Scientific Charts
- Indicators
- Trade Classes
- Strategy Modules
- Panels and Dialogs
Moving from MQL4
List of MQL5 Functions
List of MQL5 Constants
More
About

Language Basics
- Syntax
- Data Types
- Operations and Expressions
- Operators
- Functions
- Variables
- Preprocessor
- Object-Oriented Programming
- Namespaces
Constants, Enumerations and Structures
- Chart Constants
- Objects Constants
- Indicator Constants
- Environment State
- Trade Constants
- Named Constants
- Data Structures
- Codes of Errors and Warnings
- Input/Output Constants
MQL5 programs
- Program Running
- Trade Permission
- Client Terminal Events
- Resources
- Call of Imported Functions
- Runtime Errors
- Testing Trading Strategies
Predefined Variables
- _AppliedTo
- _Digits
- _Point
- _LastError
- _Period
- _RandomSeed
- _StopFlag
- _Symbol
- _UninitReason
- _IsX64
Common Functions
- Alert
- CheckPointer
- Comment
- CryptEncode
- CryptDecode
- DebugBreak
- ExpertRemove
- GetPointer
- GetTickCount
- GetTickCount64
- GetMicrosecondCount
- MessageBox
- PeriodSeconds
- PlaySound
- Print
- PrintFormat
- ResetLastError
- ResourceCreate
- ResourceFree
- ResourceReadImage
- ResourceSave
- SetReturnError
- SetUserError
- Sleep
- TerminalClose
- TesterHideIndicators
- TesterStatistics
- TesterStop
- TesterDeposit
- TesterWithdrawal
- TranslateKey
- ZeroMemory
Array Functions
- ArrayBsearch
- ArrayCopy
- ArrayCompare
- ArrayFree
- ArrayGetAsSeries
- ArrayInitialize
- ArrayFill
- ArrayIsDynamic
- ArrayIsSeries
- ArrayMaximum
- ArrayMinimum
- ArrayPrint
- ArrayRange
- ArrayResize
- ArrayInsert
- ArrayRemove
- ArrayReverse
- ArraySetAsSeries
- ArraySize
- ArraySort
- ArraySwap
- ArrayToFP16
- ArrayToFP8
- ArrayFromFP16
- ArrayFromFP8
Matrix and Vector Methods
- Matrix and Vector Types
- Initialization
- Manipulations
- Operations
- Products
- Transformations
- Statistics
- Features
- Solutions
- Machine learning
- OpenBLAS
Conversion Functions
- CharToString
- CharArrayToString
- CharArrayToStruct
- StructToCharArray
- ColorToARGB
- ColorToString
- DoubleToString
- EnumToString
- IntegerToString
- ShortToString
- ShortArrayToString
- TimeToString
- NormalizeDouble
- StringToCharArray
- StringToColor
- StringToDouble
- StringToInteger
- StringToShortArray
- StringToTime
- StringFormat
Math Functions
- MathAbs
- MathArccos
- MathArcsin
- MathArctan
- MathArctan2
- MathClassify
- MathCeil
- MathCos
- MathExp
- MathFloor
- MathLog
- MathLog10
- MathMax
- MathMin
- MathMod
- MathPow
- MathRand
- MathRound
- MathSin
- MathSqrt
- MathSrand
- MathTan
- MathIsValidNumber
- MathExpm1
- MathLog1p
- MathArccosh
- MathArcsinh
- MathArctanh
- MathCosh
- MathSinh
- MathTanh
- MathSwap
String Functions
- StringAdd
- StringBufferLen
- StringCompare
- StringConcatenate
- StringFill
- StringFind
- StringGetCharacter
- StringInit
- StringLen
- StringSetLength
- StringReplace
- StringReserve
- StringSetCharacter
- StringSplit
- StringSubstr
- StringToLower
- StringToUpper
- StringTrimLeft
- StringTrimRight
Date and Time
- TimeCurrent
- TimeTradeServer
- TimeLocal
- TimeGMT
- TimeDaylightSavings
- TimeGMTOffset
- TimeToStruct
- StructToTime
Account Information
- AccountInfoDouble
- AccountInfoInteger
- AccountInfoString
Checkup
- GetLastError
- IsStopped
- UninitializeReason
- TerminalInfoInteger
- TerminalInfoDouble
- TerminalInfoString
- MQLInfoInteger
- MQLInfoString
- Symbol
- Period
- Digits
- Point
Event Handling
- OnStart
- OnInit
- OnDeinit
- OnTick
- OnCalculate
- OnTimer
- OnTrade
- OnTradeTransaction
- OnBookEvent
- OnChartEvent
- OnTester
- OnTesterInit
- OnTesterDeinit
- OnTesterPass
Market Info
- SymbolsTotal
- SymbolExist
- SymbolName
- SymbolSelect
- SymbolIsSynchronized
- SymbolInfoDouble
- SymbolInfoInteger
- SymbolInfoString
- SymbolInfoMarginRate
- SymbolInfoTick
- SymbolInfoSessionQuote
- SymbolInfoSessionTrade
- MarketBookAdd
- MarketBookRelease
- MarketBookGet
Economic Calendar
- CalendarCountryById
- CalendarEventById
- CalendarValueById
- CalendarCountries
- CalendarEventByCountry
- CalendarEventByCurrency
- CalendarValueHistoryByEvent
- CalendarValueHistory
- CalendarValueLastByEvent
- CalendarValueLast
Timeseries and Indicators Access
- Indexing Direction in Arrays, Buffers and Timeseries
- Organizing Data Access
- SeriesInfoInteger
- Bars
- BarsCalculated
- IndicatorCreate
- IndicatorParameters
- IndicatorRelease
- CopyBuffer
- CopyRates
- CopySeries
- CopyTime
- CopyOpen
- CopyHigh
- CopyLow
- CopyClose
- CopyTickVolume
- CopyRealVolume
- CopySpread
- CopyTicks
- CopyTicksRange
- iBars
- iBarShift
- iClose
- iHigh
- iHighest
- iLow
- iLowest
- iOpen
- iTime
- iTickVolume
- iRealVolume
- iVolume
- iSpread
Custom Symbols
- CustomSymbolCreate
- CustomSymbolDelete
- CustomSymbolSetInteger
- CustomSymbolSetDouble
- CustomSymbolSetString
- CustomSymbolSetMarginRate
- CustomSymbolSetSessionQuote
- CustomSymbolSetSessionTrade
- CustomRatesDelete
- CustomRatesReplace
- CustomRatesUpdate
- CustomTicksAdd
- CustomTicksDelete
- CustomTicksReplace
- CustomBookAdd
Chart Operations
- ChartApplyTemplate
- ChartSaveTemplate
- ChartWindowFind
- ChartTimePriceToXY
- ChartXYToTimePrice
- ChartOpen
- ChartFirst
- ChartNext
- ChartClose
- ChartSymbol
- ChartPeriod
- ChartRedraw
- ChartSetDouble
- ChartSetInteger
- ChartSetString
- ChartGetDouble
- ChartGetInteger
- ChartGetString
- ChartNavigate
- ChartID
- ChartIndicatorAdd
- ChartIndicatorDelete
- ChartIndicatorGet
- ChartIndicatorName
- ChartIndicatorsTotal
- ChartWindowOnDropped
- ChartPriceOnDropped
- ChartTimeOnDropped
- ChartXOnDropped
- ChartYOnDropped
- ChartSetSymbolPeriod
- ChartScreenShot
Trade Functions
- OrderCalcMargin
- OrderCalcProfit
- OrderCheck
- OrderSend
- OrderSendAsync
- PositionsTotal
- PositionGetSymbol
- PositionSelect
- PositionSelectByTicket
- PositionGetDouble
- PositionGetInteger
- PositionGetString
- PositionGetTicket
- OrdersTotal
- OrderGetTicket
- OrderSelect
- OrderGetDouble
- OrderGetInteger
- OrderGetString
- HistorySelect
- HistorySelectByPosition
- HistoryOrderSelect
- HistoryOrdersTotal
- HistoryOrderGetTicket
- HistoryOrderGetDouble
- HistoryOrderGetInteger
- HistoryOrderGetString
- HistoryDealSelect
- HistoryDealsTotal
- HistoryDealGetTicket
- HistoryDealGetDouble
- HistoryDealGetInteger
- HistoryDealGetString
Trade Signals
- SignalBaseGetDouble
- SignalBaseGetInteger
- SignalBaseGetString
- SignalBaseSelect
- SignalBaseTotal
- SignalInfoGetDouble
- SignalInfoGetInteger
- SignalInfoGetString
- SignalInfoSetDouble
- SignalInfoSetInteger
- SignalSubscribe
- SignalUnSubscribe
Network Functions
- SocketCreate
- SocketClose
- SocketConnect
- SocketIsConnected
- SocketIsReadable
- SocketIsWritable
- SocketTimeouts
- SocketRead
- SocketSend
- SocketTlsHandshake
- SocketTlsCertificate
- SocketTlsRead
- SocketTlsReadAvailable
- SocketTlsSend
- WebRequest
- SendFTP
- SendMail
- SendNotification
Global Variables of the Terminal
- GlobalVariableCheck
- GlobalVariableTime
- GlobalVariableDel
- GlobalVariableGet
- GlobalVariableName
- GlobalVariableSet
- GlobalVariablesFlush
- GlobalVariableTemp
- GlobalVariableSetOnCondition
- GlobalVariablesDeleteAll
- GlobalVariablesTotal
File Functions
- FileSelectDialog
- FileFindFirst
- FileFindNext
- FileFindClose
- FileIsExist
- FileOpen
- FileClose
- FileCopy
- FileDelete
- FileMove
- FileFlush
- FileGetInteger
- FileIsEnding
- FileIsLineEnding
- FileReadArray
- FileReadBool
- FileReadDatetime
- FileReadDouble
- FileReadFloat
- FileReadInteger
- FileReadLong
- FileReadNumber
- FileReadString
- FileReadStruct
- FileSeek
- FileSize
- FileTell
- FileWrite
- FileWriteArray
- FileWriteDouble
- FileWriteFloat
- FileWriteInteger
- FileWriteLong
- FileWriteString
- FileWriteStruct
- FileLoad
- FileSave
- FolderCreate
- FolderDelete
- FolderClean
Custom Indicators
- Indicator Styles in Examples
- Connection between Indicator Properties and Functions
- SetIndexBuffer
- IndicatorSetDouble
- IndicatorSetInteger
- IndicatorSetString
- PlotIndexSetDouble
- PlotIndexSetInteger
- PlotIndexSetString
- PlotIndexGetInteger
Object Functions
- ObjectCreate
- ObjectName
- ObjectDelete
- ObjectsDeleteAll
- ObjectFind
- ObjectGetTimeByValue
- ObjectGetValueByTime
- ObjectMove
- ObjectsTotal
- ObjectSetDouble
- ObjectSetInteger
- ObjectSetString
- ObjectGetDouble
- ObjectGetInteger
- ObjectGetString
- TextSetFont
- TextOut
- TextGetSize
Technical Indicators
- iAC
- iAD
- iADX
- iADXWilder
- iAlligator
- iAMA
- iAO
- iATR
- iBearsPower
- iBands
- iBullsPower
- iCCI
- iChaikin
- iCustom
- iDEMA
- iDeMarker
- iEnvelopes
- iForce
- iFractals
- iFrAMA
- iGator
- iIchimoku
- iBWMFI
- iMomentum
- iMFI
- iMA
- iOsMA
- iMACD
- iOBV
- iSAR
- iRSI
- iRVI
- iStdDev
- iStochastic
- iTEMA
- iTriX
- iWPR
- iVIDyA
- iVolumes
Working with Optimization Results
- FrameFirst
- FrameFilter
- FrameNext
- FrameInputs
- FrameAdd
- ParameterGetRange
- ParameterSetRange
Working with Events
- EventSetMillisecondTimer
- EventSetTimer
- EventKillTimer
- EventChartCustom
Working with OpenCL
- CLHandleType
- CLGetInfoInteger
- CLGetInfoString
- CLContextCreate
- CLContextFree
- CLGetDeviceInfo
- CLProgramCreate
- CLProgramFree
- CLKernelCreate
- CLKernelFree
- CLSetKernelArg
- CLSetKernelArgMem
- CLSetKernelArgMemLocal
- CLBufferCreate
- CLBufferFree
- CLBufferWrite
- CLBufferRead
- CLExecute
- CLExecutionStatus
Working with databases
- DatabaseOpen
- DatabaseClose
- DatabaseImport
- DatabaseExport
- DatabasePrint
- DatabaseTableExists
- DatabaseExecute
- DatabasePrepare
- DatabaseReset
- DatabaseBind
- DatabaseBindArray
- DatabaseRead
- DatabaseReadBind
- DatabaseFinalize
- DatabaseTransactionBegin
- DatabaseTransactionCommit
- DatabaseTransactionRollback
- DatabaseColumnsCount
- DatabaseColumnName
- DatabaseColumnType
- DatabaseColumnSize
- DatabaseColumnText
- DatabaseColumnInteger
- DatabaseColumnLong
- DatabaseColumnDouble
- DatabaseColumnBlob
Working with DirectX
- DXContextCreate
- DXContextSetSize
- DXContextGetSize
- DXContextClearColors
- DXContextClearDepth
- DXContextGetColors
- DXContextGetDepth
- DXBufferCreate
- DXTextureCreate
- DXInputCreate
- DXInputSet
- DXShaderCreate
- DXShaderSetLayout
- DXShaderInputsSet
- DXShaderTexturesSet
- DXDraw
- DXDrawIndexed
- DXPrimiveTopologySet
- DXBufferSet
- DXShaderSet
- DXHandleType
- DXRelease
Python Integration
- initialize
- login
- shutdown
- version
- last_error
- account_info
- terminal_info
- symbols_total
- symbols_get
- symbol_info
- symbol_info_tick
- symbol_select
- market_book_add
- market_book_get
- market_book_release
- copy_rates_from
- copy_rates_from_pos
- copy_rates_range
- copy_ticks_from
- copy_ticks_range
- orders_total
- orders_get
- order_calc_margin
- order_calc_profit
- order_check
- order_send
- positions_total
- positions_get
- history_orders_total
- history_orders_get
- history_deals_total
- history_deals_get
ONNX models
- ONNX Support
- Format Conversion
- Automatic data type conversion
- Creating a Model
- Running a model
- Validation in the Strategy Tester
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MQL5 Reference

Standard Library

Generic Data Collections

CHashSet<T>

Count

Returns the number of elements in a set.

int Count();

Return Value

Returns the number of elements.

Last updated on 2026-07-24

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