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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 71


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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The indicator searches for the patterns, displays the end of the D and C points on the screen.

An effective trade system, it determines the levels of support/resistance, rollback, trend reverse by a complex mathematical algorithm.

It uses three timeframes to determine a trend.

The indicator is based on CandlesticksBW. It colors the japanese candlesticks by B. Williams displaying the "black" and "white" candlesticks.

The 2_Otkat_Sys_v1.1. expert advisor. The system from thursday to friday on 0(МТ) hours, it trades only on a reverse.

The indicator is written by the fourth dimension of B. Williams - Trading Zone.

It represents a standard MovingAverage indicator with the function of smoothing by the second-order Butterworth filter added.

Indicator of Bollinger bands.

Another version of the Madeleine indicator.

Rabbit 2 updated with correct set!

The indicator shows the break through line.

Using a combination of MA for the trend and Williams %R wth Commodoties Channel Inex to trigger, and a Dochian band to exit the RabbitM2 is designed to get from zero to hero. I would welcome anyone willing to perform live testing and give me feedback.

The indicator shows the probabilistic reverses.

The indicator of Fibo levels and arcs drawing.

ZigZag with rays (on a break through)

An analogue of the intersection of two stochastics.

A simple indicator that displays the chart of the symbol in the window of another symbol.

Indicator of STOPLEVEL.

Hedge The Hedge Trader EA

Indicator TrendManagerNT.

Indicator NewTrend_v1.

Indicator Pivot Mid Support Historical.v1

Improved version of 10 pips a day opposite "yesterday's trend" EA

It's a pattern tha I use in my tradings. It's based in CCI/MA and Bollinger.

One of the varieties of the price channel.

Indicator MAAngleTony.

An indicator that divides the M1 period into H1.

An indicator of the trend alteration.

Modified valasholic13 indicator.

An indicator of trend reverse.

It shows the buy and sell signals.

Indicator Kuskus Starlight.

The indicator displays the time of the trading session.

Modified MarketTime indicator .

The library is intended for working with the global graphical variables.

This Expert Advisor trades every news event that is scheduled to release on for the current week. The EA waits for the next news event to be released, compares the released economic data, determines which currency to trade and exe

A script for uploading the history by all known currency pairs, metals, indexes, CFD's and for controlling the "hole" in the history.

It displays how the price is changed in points with the coming of a new tick.

Anyone know how to improve this EA i put together ? Cheers

It shows how the price changed with the coming of a new tick.