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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 149


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 channel drawn on High and Low prices of daily candlesticks

The speed indicator of price change smoothed by the JMA averaging.

A tape indicator which defines the market state using the AbsoluteStrength indicator

A typical and sufficiently smooth oscillator which can apply all oscillator analytical instruments

Volume indicator smoothed by the Laguerre filter

The indicator displays the situation when the direction of price movement and technical indicators does not coincide

A semaphore signal indicator for the moments when the trend force measured by the deviation of the price from the Moving Average is higher than a fixed limit

The Expert Advisor "catches" changes of the positions (opening, reversal, closing, triggering of Stop Loss and Take Profit) and depending on the configurations triggers the sound file, outputs alert or sends e-mail.

The indicator to determine the trend reversals on the basis of Bollinger Bands

The unnormalized oscillator using Fisher Transform

The "Fast ZigZag" indicator including the drawing of DiNapoli's target levels

The indicator uses in the calculation the deviation of its previous value from price

This indicator simply alerts and sends email every time the trend line touched by the price.

Two different period Moving Averages to define the direction of the trend and the semaphore signal indicator to specify the moment for settlement of a deal

Function to define the trend strength

The oscillator for intraday trading.

The smooth oscillator performed in the form of the color histogram

The indicator forecasts day's price range

A simple trend indicator.

The system of three signal indicators in one window

A typical Moving Average

Phoenix5 is Forex signal indicator which traditionally represents itself a set of pink and blue points

The oscillator that displays strengths of Buyers (Bulls) and Sellers (Bears) separately.

Trading system using the AsimmetricStochNR indicator.

The indicator to display time ranges

QQEA is Forex oscillator with an undistinguished name drawn on the basis of the Moving Averages and the RSI technical indicator.

R-squared is the linear regression indicator to calculate "reliability" of the current trend

The SlopeDirectionLine trend indicator with the ability to change the algorithms of averaging and triggering alerts, push notifications and sending e-mail messages.

The indicator draws the lines of day start and its high and low price values.

The semaphore arrow indicator of trend change

The trend indicator drawn on the basis of a Moving Average


The TTF classic indicator with T3 smoothed method and a signal line.

The trend indicator drawn in the form of the color cloud

The class for localization/multilingual support of text messages in user MQL5 programs

The advanced presentation of the Bollinger Bands indicator

The trade system using the ColorCoppock oscillator.

The Range indicator calculates the range expansion index and displays the range of price change in the current bar

The "Day of Week" function is designed to determine the number of required month according to data of the week and the day of the week inside this month

Two histograms to define the current market situation

The channel formed by two trend lines drawn at the high and low formed by the last two fractals