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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 67


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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The oscillator indicator based on Lyapunov stability theory, with the Hodrick-Prescott filter

Sine-Weighted Moving Average

An indicator of bands with a signal line

A trend indicator 'Magic Trend'

Larry Large Trade Index

Larry Commerical Proxy Index

Elastic Volume Weighted MA

The indicator of candlestick direction ratio


Dynamic Moving Average

The ratio of bullish to bearish candlesticks over the selected period

An oscillator indicator of probable reversals


The Blast Off oscillator indicator


Williams' Vix Fix indicator


The Velocity/Acceleration indicator.

The unsmoothed RSI indicator.

Trend_Percentage - the ratio of bulls and bears.


The Trend Detection Index.


Point of Balance (POB).


Detrended Synthetic Price (DSP) Oscillator

The Awesome Oscillator (AO) indicator with configurable parameters.


Average Period Range - an indicator of the average daily range.

An indicator of daily levels.

The Expert Advisor places a grid of pending Buy Stop and Sell Stop orders.

The Highest Lowest indicator searches for bars having High above the High of bars on the left and on the right, as well as bars having Low below the Low of bars on the left and on the right. Uses the DRAW_ARROW style.

A trend oscillator.


Ulcer Index (UI) - the volatility decrease index.

John Carter TTM Squeeze - an indicator of trend zones.

A Trend Oscillator.


Trend indicator Recursive Trendline (RTL).


Price Volume Trend (PVT) is an indicator of price trend and volume, similar to the standard On Balance Volume (OBV) indicator.

The indicator shows the open price of a period.

An oscillator indicator showing a difference between MA and the price.

A volume indicator with different types of data representation.

A trend indicator: Smoothed High/Low Linear regression band.

A trend indicator: High/Low Linear regression band.

MACD based on the Linear regression MA.

The script draws horizontal lines representing BUY (blue) and SELL (red) orders.

The MESA Adaptive Moving Average (MAMA) and the Following Adaptive Moving Average (FAMA) combination made to be multi timeframe.

Combination of MAMA (MESA Adaptive Moving Average) and FAMA (Following Adaptive Moving Average) made as an oscillator.

This indicator uses the combined values of MAMA (MESA Adaptive Moving Average) and FAMA (Following Adaptive Moving Average) to assess the trend of the market.