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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 57

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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A function for calculation of the area of three objects: a rectangle, ellipse or a triangle.

Indicator TII_RLH.

Indicator Gideon's_ATR.

The indicator shows in a special terminal window the current symbol, the Bid/Ask rates, and the current SWAP for position LONG/SHORT, as well as floating SPREAD for a distant symbol... Let's see... Pokazuje w osobnym okienku aktualny instrument, Kursy Bi

The indicator that sets the signals of trend reverse.

Indicator ASCTrend1sig.

Indicator High_Low (ZigZag).

The Keltner Channel indicator determines the most significant trends.

Two CCI indicators with different periods in a single subwindow.

The Detrendeded Price Oscillator (DPO) indicator looks like a moving average because it filters the directivity (trend) in the price values in the same manner.

The oscilator rapidly discovers the end of the price trend and the beginning of the price movement in a horizontal interval and reverse.

It deletes a pending order or closes an opened order in accordance with your selection. It is necessary just to drag the script to an order. The script will choose the closest one and will close or delete it.

The indicator of the instantaneous trend line InsTrend.

The script shows the conditions of the correct and closest placing of the StopLoss and TakeProfit of the orders.

Elliott Wave Oscillator

Indicator Average Volume.

Indicator Camarilladt.

Indicator Laguerre.

Indicator Ultitimate Oscillator.

Indicator Taf.

Indicator T3 Taotra.

Indicator Schaff Trend.

The NRTR indicator lies below the chart at rising trends and lies above the chart at descending trends.

A simple EA that uses 2 indicators AO and RAVI (attached) in its working. NOT OPTIMIZED!!! Good results on EUR/USD - H1.

This EA is based on the statistics with an element of Martingale.

The concept of this EA is to monitor several indicators and trade based on a value returned by those indicators.

Indicator WcciPatterns. See the description at the indicator's code itself.

The indicator determines the patterns of the Woodies CCI trading system.

TS based on the intersection of two MAs filtered by the CCI signals.

МА on the basis of a parabolic regression with Bollinger bands.

The name is self-explanatory. The error that presented in the previous implementations is corrected here.

МТS performs a trading oriented at the panic, publishing of the important economical indexes at the FOREX market.

An adjuvant indicator that is based on the moving averages.

Perry Kaufman's AMA with the double Bollinger bands.

Bollinger bands.

Do you have the need to take the opposite side of a trade? Using manual trading or another EA, EES Hedger can immediately take the opposite position as specified in EA parameters. Instructions: For example, you are trading SAR EA on GBPUSD and SAR

An EA that writes the time of disconnections from the server into a file.

The EA was developed on the basis of the Sidus indicator. It trades on EURUSD H1. Shows good results on the history after optimization. The test was performed on the quotes from http://metaquotes.ru/ and "Alpari" DC.

This expert dertemines the trend at a specific time then it goes in the opposite side

A regular modification of the fractals by B. Williams.

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