Technical Indicators - MQL4 Reference

MQL4 Reference Technical Indicators

Technical Indicator Functions

A group of functions intended for calculation of standard and custom indicators.

For an Expert Advisor (or any other MQL4 program) to take up the value of any indicator, it is not necessary that this indicator is present in the chart. The requested indicator will be loaded and calculated in the thread of the module that has called it.

Any indicator can be calculated on the data of not only current chart, but also on the data of any available symbol/period. If data (symbol name and/or timeframe differ from the current ones) are requested from another chart, the situation is possible that the corresponding chart was not opened in the client terminal and the necessary data must be requested from the server. In this case, error ERR_HISTORY_WILL_UPDATED (4066 - the requested history data are under updating) will be placed in the last_error variable, and one will has to re-request (see example of ArrayCopySeries()).

All indicator functions have at least 2 parameters - symbol and period. The NULL value of the symbol means the current symbol, the 0 value of the period means the current timeframe.

Function	Returns the indicator value
iAC	Accelerator Oscillator
iAD	Accumulation/Distribution
iADX	Average Directional Index
iAlligator	Alligator
iAO	Awesome Oscillator
iATR	Average True Range
iBearsPower	Bears Power
iBands	Bollinger Bands®
iBandsOnArray	Calculation of Bollinger Bands® indicator on data, stored in a numeric array
iBullsPower	Bulls Power
iCCI	Commodity Channel Index
iCCIOnArray	Calculation of Commodity Channel Index indicator on data, stored in a numeric array
iCustom	Custom indicator
iDeMarker	DeMarker
iEnvelopes	Envelopes
iEnvelopesOnArray	Calculation of Envelopes indicator on data, stored in a numeric array
iForce	Force Index
iFractals	Fractals
iGator	Gator Oscillator
iIchimoku	Ichimoku Kinko Hyo
iBWMFI	Market Facilitation Index by Bill Williams
iMomentum	Momentum
iMomentumOnArray	Calculation of Momentum indicator on data, stored in a numeric array
iMFI	Money Flow Index
iMA	Moving Average
iMAOnArray	Calculation of Moving Average indicator on data, stored in a numeric array
iOsMA	Moving Average of Oscillator (MACD histogram)
iMACD	Moving Averages Convergence-Divergence
iOBV	On Balance Volume
iSAR	Parabolic Stop And Reverse System
iRSI	Relative Strength Index
iRSIOnArray	Calculation of Momentum indicator on data, stored in a numeric array
iRVI	Relative Vigor Index
iStdDev	Standard Deviation
iStdDevOnArray	Calculation of Standard Deviation indicator on data, stored in a numeric array
iStochastic	Stochastic Oscillator
iWPR	Williams' Percent Range

What's new in MQL5

In MQL5, the number of built-in technical indicators has been increased from 30 to 38. The indicators are generated and managed using handles to avoid unnecessary copies and reduce memory consumption. For the same purpose, new functions for working with indicators and timeseries are presented — they allow receiving indicator values in entire arrays rather than by a single value.

New functions have been added for working with indicators. Among them are ChartIndicatorAdd() and IndicatorRelease() ones for dynamic adding and removal of indicators when creating complex technical analysis tools.

Function	Action
ChartIndicatorAdd	Add an indicator with the specified handle into a specified chart window
IndicatorRelease	Delete an indicator handle and release its calculation part if unused

ObjectTypeiAC