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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 31

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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Export text to Excel in real time using native DDE library provided by Windows

Uses up to 4 visual "sliders" in the chart window to quickly and easily adjust values of any technical indicator in a separate window. Based on MetaTrader 4 chart objects, not DLLs.

Different view of the figures and the patterns of the day ....

Writes days of week above candles.

Moving average on the basis of individual price

This set of scripts has been designed to scale-in your trades as price action runs in your favor. This will maximize profits due to proper pyramiding, decrease the impact of unprofitable trading decisions and in general, make your life easier.

Indicator displays information about the current positions

This is a new implementation of the SuperTrend indicator for MetaTrader 4. The SuperTrend indicator is an application of the concept of MAE (maximum adverse excursion), which was introduced by John Sweeney in the mid-nineties.

Expert Advisor opens deals based on price consolidations

The Expert Advisor places buy trades when RSI crosses above 73 and sells when it drops below 27. A trailing stop based on ATR protects profits.

See http://forum.mql4.com/54660 for getting a connection between highs and a connection between lows. I made a zigzag this way.

Improvements to the previous version.

I wrote a new indicator to find the range bound period, then we can place order when the price break the range bound.

The indicator specifies on trend and lateral movements of the price.

The moving average that divides the prices for classes. The classes with extreme price get bigger weight (importance)

Drag and drop wave counts.

I'm looking for a skilled programmer that can take my existing EA alert and fine tune it. I have a solid set of rules that consistantly make me money, and I am looking to automate the signals so that I can effectively manage several currency charts at th

"Follow Your Heart" is an Expert Advisor that open an Order strictly by price increase/decrease during nBars on the M1 time frame (without any indicators).

This EA will open a Long Order if the Price move above yesterday High or Short Order if the Price move beneath yesterday Low.

Expert Advisor based on the ACD and MA Attention: this is not a Holy Grail

Trades when two moving averages cross each other

Trades using parabolic SAR signals

Shows you profit history in real time.

Many developers face the same problem - how to get to the trading terminal sandbox without using unsafe DLLs. One of the easiest and safest method is to use standard Named Pipes that work as normal file operations.

Moving Average on Moving Average

Strategy is founded on support and resistance AND the theory that the market moves in trends or consolidated horizontal movement containing smaller ranges. It uses default custom indicator moving average and partial order closing. -WhooDoo22.

Execute Script only one time and it will delete all pending orders i.e Limits and Stops by this script at once. No Need to run script for each order separately.

Renko Expert Advisor.

Multi-currency EA, working on brekouts and stop-orders.

Autostop automatically sets stops on open trades

A simple script to quickly place letter/numbers on the chart for wave labeling (A, B, C or 1, 2, 3, etc)

Schaff Trend + Signal EMA

Improved functions iAC, iAO and iBearsBulls

Scripts to modify stop loss in buy or sell opened orders on current chart.

For those trader who can't stand having the Market Watch or Navigator boxes up on their platform but like to have a time displayed on chart a Simple Clock Indicator

Extension of VR --- SETKA. Advisor to the grid works by Martin ...

Indicator BoDi for finding signals to close position.

Calculates the profit from oppened trades if the Price reaches the dropped Price

Opens specified trades at the specified time

MFI indicator with possibility to establish applied price.

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