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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 68

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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Indicator SSL_channel_chart_alert.

Indicator Parabolic with a signal.

Indicator MA_Dash_Cobra.

Indicator SSL fast sBar_mtf

This is not an automatic system. It is fully manual.

Indicator FIBO_S.

One Side Gaussian indicators, corrected and supplemented

Indicator VQ bars.

An expert advisor that makes a decision on the basis of the indistinc logic (so-called Fuzzy logic). The A. Nedosekin's (http://sedok.narod.ru/scoring_USA.html) materials were used during the development of the classificator and the resultant for ranks.

An implementation of all patterns FOREX MACD 4H strategy in one EA.

Indicator MACD with crossing.

The indicator FiboPiv_Daily_DK.

A ZigZag alike the one used in Ensign with little differences (v1). With displaying of statical and dynamical fibs and Andrews' pitchfork.

The indicator is intended for searching the correlations between different symbols. It allows to overlay one chart with another to visually detect how do different symbols correlate between each other.

The indicator of MA-channel allows to analyse the dynamics of the price by using the technique of A_Vlad, the gist of it is the line of balance LB acts as the attraction of price when there is no external influence.

It displays Fibo levels of the price channel created on the moving avrage.

The indicator OzFx Signals v1.7.

The EA trades based on the trend continuation pattern of the MACD indicator.

The indicator "sell zone fibs".

The library contains the functions that ease the writing of EAs.

The script automates the drawing of time lines of opening/closing of a calendar day and the price lines of opening/closing of the days.

An indicator to discover the trend/flat and fallacious technical data.

A moving average calculated according to the method of the linear regression and complemented buy the Bollinger bands.

The AllAverages_v1 indicator.

A pipser.

The indicator displays the statistics of maximums and minimums in the form of a hystogram located to the left of the chart in the chart window.

The CCI CustomCandles indicator.

The Rads MACD indicator.

Automatically draws Fibonacci Retracement lines from yesterday's range, or today's range.

This expert is based on the Trix indicator created by raff1410

The SuperTrend indicator developed for MetaTrader 4 based on the ProRealTime version.

A two CCI with the coloured trend bars

This indicator separates the days into two different colours on the chart.

The Multi pair MACD indicator. Another variant of MACD, shows the signals for the following pairs: EURUSD, GBPUSD и USDCAD.

A new version of indicator MACD Colored.

The indicator is rewritten from FXAccuCharts to MT4.

The indicator is almost 2 years old. I didn't lay it out, because I had no idea of how to use it.

An example of the script that writes the values of the RSI indicator to a CSV file.

The indicator MoR.

An excellent work for the future. A high profitableness.

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