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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 58


This is the largest free source code library for MetaTrader 5 platform programs. Here you can find ready-made Expert Advisors, technical indicators, scripts and libraries. Use the code library when learning MQL5 language and develop your own automated trading applications based on the provided codes.

You can freely download and test published codes, as well as launch them in MetaTrader 5. The library is also available directly from MetaTrader 5 platform and MetaEditor development environment.

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Historical Volatility (HV) is a statistical measure of the dispersion of returns for a given security or market index over a given period of time. Generally, this measure is calculated by determining the average deviation from the average price of a financial instrument in the given time period.

BB Stops indicator of smoothed WPR.

BB Stops using RSI for stops calculation.

MACD indicator that is using very well known BB Stops instead of using signal line for signals.

Volatility Quality indicator made "on-chart".

Super Trend indicator extended with additional display types.

Super Trend indicator is probably one of the most known for MetaTrader 4. This version is for MetaTrader 5.

Trend Envelopes indicator made as histogram.

Fibonacci Pivot points indicator that can draw any number of levels for any of the known timeframes usable by MetaTrader 5.

RSI Candles (RSI that calculates RSI of High, Low Open and Close and displays those values as candles) with an addition of Trend Envelopes.

The QQE (Quantitative Qualitative Estimator) made multi timeframe.

Four different CCIs combined into a "candles" display of CCI. For smoothing you can use one of the 4 basic types of averages: SMA, EMA, SMMA or LWMA.

Four different CCIs combined into a "candles" display of CCI.

Combination of 4 RSI values (RSI of High, Low, Open and Close) displayed as candles with additional option to enable prices pre-smoothing prior to be used in calculation, which makes it an RSI-of-MA combination.

This is a RSI of High, Low, Open and Close displayed as color candles in it's own sub-window.

Trend Envelopes variation of RSI indicator.

Trend Envelopes indicator is using only % deviation for calculation and that is the only parameter needed for calculation. It is internally using Close, High and Low price and in this version that can not be changed. Also, due to the nature of the indicator, it can be easily be used as a sort of support/resistance indicator.

This version of ADX instead uses different display in order to make that as easy as it can be. The ADX values are easily comparable to the significant level, the the color of the ADX value and histogram clearly shows the trend. That way it is easier to follow the ADX trend(s) and values.

EMA_WMA - Expert Advisor for MetaTrader 5. Intersection of two iMA (MA). Position trailing.

The Expert Advisor waits when the lines of MA(10), MA(20), MA(50), MA(100) and MA(200) get arranged one above the other (or one below the other).

An Expert Advisor based on a random number generator. Trend is determined using the iMA (Moving Average, MA) indicator.

A script calculating the distance between a point and a line.

The Expert Advisor trades using levels. It can have a maximum of two positions of each type (Buy and Sell) in the market.

A weighted CCI.

A portfolio EA for the MOEX FORTS market.

An indicator of trend strength.

A smoothed RSI.

Divergences of the Repulse oscillator.

An indicator of possible price "rebounds".

The Overbought/Oversold Index

The Performance Index indicator.

A Moving Average with the smoothing type by Mark Jurik.

An indicator of important extremums.

A trading system based on the Donchian Channel indicator.

Integral of Linear Regression Slope (ILRS MA).

An indicator of the dominant direction of closing of bars.

Triangular Moving Average.

An indicator of StopLoss levels.

An indicator of current support/resistance levels.


The tend indicator: Rahul Mohindar Oscillator