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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 95


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 MA Alert.

Indicator MTF Forex freedom Bar.

Classical kind of channels.

Indicator RCI.

Indicator Intra Day.


Indicator DUR.

Indicator Trend Manager.

Indicator FX Fish 2MA.


The indicator draws the channel.

Indicator MultipleMA.

The indicator showing a trend.

Indicator ZigZag with levels Fibo.

One more version Trend Manager.

One more version of indicator TTF, draws points Buy and Sell.

Indicator EMA Angle Zero.

One more version of indicator J TPO.

Other version of indicator JMA.

The indicator which shows points of a probable turn.

Indicator Fisher mbk.

The indicator shows points BUY and SELL.

Indicator Custom Aroon Up & Dn.

Draws on the schedule possible behaviour of the price.

Filter AO helps to filter flet.

The indicator showing a maximum and a minimum of pregoing day.

The indicator shows a trend.

Tick indicator Tick on Chart.

The indicator of trading sessions.

The indicator of trading system pabloski.

The indicator shows the forecast for 12 bars forward.

Defines intensity and a direction of a trend.

The indicator draws levels.

The indicator of trading system pabloski.

The indicator showing channels.

Updating of version VIII.

One more version of the digital indicator.

The indicator shows the beginning and the end flet.

One of versions of channel DiNapoli.

Volume with Custom Moving Average.

The alarm indicator 3MA Cross w_Alert v2.

The indicator shows levels of support/resistance.