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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 100


The largest library features codes of free trading Expert Advisors, technical indicators and scripts. With the available applications you can trade in automated mode and analyze price dynamics. Use the library of codes to learn more about financial market sentiments.

Download free applications, test them and run in your MetaTrader 4. You can access them from the MetaTrader 4 platform and the MetaEditor development environment.

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Delta Force Indicator.

DayTrading Expert Advisor.

Correlation USDCHF/EURUSD Indicator.

STLM_hist Indicator.

Vegas Indicator.

AutoDayFibs Indicator.

BandsLSMA Indicator.

Camarilladt Indicator.

Laguerre Indicator.

Starter Expert Advisors.


Taf Indicator.

Ultitimate Oscillator Indicator.

T3 Taotra Indicator.

T3 Bands Indicator.

Schaff Trend Indicator.

Price Channel Indicator.

NRTR Indicator.

The Keltner Channel indicator locates the most important trends.

iTrend Indicator determines where the trend starts and ends.

Instantaneous Trend Line indicator InsTrend.

Average Volume indicator.

High_Low (ZigZag) indicator.

Hi-Lo indicator.

Elliott Wave Oscillator

Detrended Price Oscillator

Two CCI indicators with different periods in the same indicator subwindow.

The oscillator quickly finds out the trend stop and the start of sideways trend in horizontal interv


Adaptive Moving Average

Indicator that signals about trend turns.

This script evaluates in points account history loaded into client terminal.

Set of functions for calculating optimization results.

Famous AROON Indicator, though someone will need it

Shades New York or other exchange while in session. SetImmediacyON parameter allows shading after fi

Indicator that can be used for entry and exit.

It is realized by the Trading System on a release from intraday time levels, which pay off on indica

This script takes orders from trade history and places arrows on chart for trades.

It is realized by the Trade Sistem on breakdown of day time levels which pay off on indicator Pivot

The Price Channel indicator calculates the highest high and lowest low of the trailing number of bars specified by the input Length.

The indicator displays Buy/Sell arrows as the MACD or RVI indicators are changing.

The DailyPivot Points indicator helps to get the idea of the future market movements, unlike other tools that are usually behind the market.