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Access the CodeBase from your MetaTrader 5 terminal

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How to Write an Expert Advisor or an Indicator

MQL4 Source Codes of Expert Advisors for MetaTrader 4

Various applications to automate analysis and trading are available in the 'Expert Advisors' section. It features various applications based on different trading algorithms and provides different degrees of automation. You can find simple EAs and complex trading robots that can fully automate analysis and trading processes.

These applications can be downloaded and run in MetaTrader 4. It is recommended to test and optimize Expert Advisors in the Strategy tester. The Expert Advisors from the library can be accessed from the MetaTrader 4 platform and the MetaEditor development environment.

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This robot optimizes the values it uses for overbought and oversold based on what would have been profitable during the Optimization periods(bars) back. Using the strategy of selling when the index indicator crosses below overbought and buying when the index indicator crosses above oversold.

Uses the analysis of 4 indicators.

Not really profitable but the code fits on one page.

The functions included in this template use two news sources - Investing.com and Dailyfx.com. The template doesn’t use DLL.

The example of multicurrency hedging implementation on a single chart in Metatrader 4.

Expert Advisor for pyramiding into big and fast market movements.

Automatic placing of Buy Stop pending order and Sell Stop pending order simultaneously, Stop Losses and Take Profits on the user specified levels. As soon as the long position (BUY) is opened as ASK price crosses the levels, the remaining pending order (SELLSTOP) is deleted. Vice versa if the short position (SELL) is opened as BID price crosses the levels, the remaining pending order (BUYSTOP) is deleted. It places again both pending orders after the opened order has been closed.

Use Chaos Theory to trade!

The EA using single layer Perceptron.

Open two buttons on a chart, one for closing all shorts, one for closing all longs. The buttons labels display the current total profit for each type of order.

Stores and implements a basic hidden Stop Loss and Take Profit system.

A simple EA based on Tipu Trend indicator and Tipu Stops indicator.

Test ChartEvent is an example demonstrating the various types of ChartEvent: keyboard keys events, mouse click & move events, custom events. The source code works both in MetaTrader 4 and MetaTrader 5.

Trailing stop allows you to automatically protect the profits with your positions. It adjusts itself according to the current market rate and the amount of pips you give it to trail behind.

This EA opens Buy or Sell trades in strongest or weakest pair. It cannot be backtested.

This expert will copy a trade with the preset volume on the same account, can be used with a signal. No cross-account functionality.

Example of Heiken Ashi Using Multi Time Frame (MTF).

This EA Opens a grid of Buy Stops and Sell Stops at a specified distance from price. Has Stop Loss, Take Profit and Trailing Stop.

The Proper Bot is for those who like Martingale style trading. Features: Stop Loss, Take Profit, Trailing Stop Loss functions. All are calculated in POINTS.

Small Expert which sends email notification of last opened and closed order.

Expert Advisor which trades breakouts in several pairs during the London Session.

Example of a simple breakout trading robot. There are a lot of breakout methods, but this is the simplest one as I think. Please see the attached images to visualize what is the breakout trading...

Expert Advisor to trade Yen Crosses based on Major Pairs and USDJPY divergence/convergence.

Code example of MACD automated with advanced money management function.

The same EA's as previously released. The additional code allows the user to set parameters on RSI and Momentum.

An EA fully based on the Ichimoku Kinko Hyo system.

Template EA that downloads news without the use of DLL.

The Expert Advisor that moves the stop loss to breakeven after reaching certain profit.

The Expert Advisor that performs order trailing after reaching certain profit.

The Expert Advisor is designed for placing managing grids.

Sells at downward crossing of 70, buys at the upward crossing of 30.

The Expert Advisor places pending limit orders at the specified distance from the price and trails them after the price with the specified step, applies martingale.

The Expert Advisor opens positions after the price passes the specified distance. 1 step up - sells, 1 step down - buys.

The SAW_system_1 Expert Advisor places pending orders on the basis of the volatility for the last N days.

An example of creating a trade panel using the MasterWindows library.

After a loss, the EA opens orders with stop levels increased by the coefficient.

Martingale grid EA. The main idea of the EA is not in accurate entries, but in flexible plotting of grids.

This is a great beginners' example of the function OnChartEvent() & creating objects on the chart to access them for some tasks.

Two EA's. One places Stop orders the other places Limit orders.

Renko chart generator using the tick values.

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