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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 56

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 stochastic_oscillator based indicator.

It shows support and resistance levels

It allows to work with reversed symbols (for example USDGBP)

It's easy to use, just input your lotsize, stoploss and take profit values (in points) and trade.

It combines two ema's, rsi and adx to give you buy or sell signals.

Create a Fibonacci retracement object automatically on your graph.

Jays candle display is a multi candle displaying indicator. It displays the swing and body of candles on different timeframes from one minute up to one day.

The script shows the price level, where total profit for all of the opened positions will be non-negative (without loss level, or break-even price level).

Displays info about the SAR in relation to the selected candles on four different timeframes.

The indicator helps to use the Elliott waves, as described in the book "Trade Chaos" by Bill Williams.

Library for virtual trading.

The script deletes objects from the chart.

It's based on the simple CCI, it plots arrows for sell and buy signals on the chart.

Use on 1M charts. Manually choose Only Long, Only Short or Short and Long depending on market direction. Close open orders moving in the opposite direction.

Program for logging of non-market quotations from brokerage companies with MetaTrader platform. ADDED: Added ability to run your own script automatically in case of non-market quotations have place.

Many people asks to post a simple expert advisor. Here is it.

It works without losses. It uses the market inefficiency for the arbitrage.

The strategy is based on breakthrough of the maximum and minimum price values of the previous trading day.

It shows Stochastics for several timeframes in a single chart, also it calculates the average value.

A finer resolution channel made of three bar fractals.

It opens and closes positions using the crossing of the movable lines.

It shows a brief information about all of the positions opened. It can be useful, if yours expert advisor trades many positions simultaneously.

It reduces a lot of false signals using sensitivity tuning.

Just Close - Parabolic SAR

Record the performance of individual strategies real time in offline charts.

This indicator for show most information about your account like : number , name , company , leverage , etc .

Creates a synthetic Hedge for any open position that you select. Use it only if are you completely understand synthetic derivatives or triangular arbitrage.

Modified version of Murrey_Math_Line v2

The trading strategy presented here is based on breakthrough strategy using FOREX time sessions characteristics.

This code will get the current time , wait until a certain amount of Seconds has passed and then continue processing.

It shows two MACD with lines on the price chart.

New Design - New Opportunities.

expert can make 10000usd monthly or may be less but it always profitable

It looks for the strongest and for the weakest currency pairs using Cluster analysis

This expert advisor uses an only one МА(55) PRICE_MEDIAN !!!

The indicator shows current balance and positions on the chart

EA based on MACD and STOCH. It will be helpful, if you test this EA with other currencies and report me, thx.

It's an instrument for spread monitoring for a real and synthetic currency pairs.

Graphic displaying of the statement, carring of a data from the *.htm table to the graph, for the convenience of analysis.

Indicator shows color lines between two MA crosses