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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 60

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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Spectr

Spectrometr_Separate

exp_Amstell

shows entry price lines. this is based on "inside bar".

The indicator shows candles of the grown-ups TF.

A simple multi currency trader EA based on SMA and LWMA.

using Stochastic m5, m15 and m30

Script for vertical grid lines plotting

Script for horizontal grid lines plotting

Многоранговые фракталы

An indicator that uses a Feed Forward Neural Network to predict the next few open prices. The network is trained using a Backpropagation method. The training is set up automatically, resulting in a self-trained network and a self-learning indicator.

Linear Weighted Fractal Dimension Index (ternd vs notrend filter) plus Step EMA

Traditional Bollinger Bands ®, revisited with algorithm based on Jurik method.

this have EA have Stoploss

This indicator for draw an Arrows for buy & sell, it's Depends on Kijun Line in Ichimoku Indicator

The function changes colour of object. An example of realization in the indicator.

The function changes the name of a font. An example of realization in the indicator.

The indicator is base on "volume spared analysis".

Мультивалютный "мониторинговый" индикатор.

Метод Усреднения

neuronirvamanEA works with neural networks . stoplloss

TD Sequential indicator based off of the criteria descripted in Jason Perl's book "Demark Indicators."

Donchian Channel Indicator

Shows important support / resistance levels from different timeframes. Advanced filtering included.

Just a configurable Bear & Bull "Harami" pattern finder.

The adviser on indicators: Ichimoku, ADX.

Change of the price expressed in percentage.

This indicator for draw an Arrows for buy & sell, it's Depends on Stochastic

This is an EA I coded to make trades and experiment with trading in the Strategy Tester. Drag and drop objects in a yellow basket and control your orders.

Multi timeframe Relative Strength Index - has additional parameter - TimeFrame. You can use it to set up higher timeframe from which Relative Strength Index will calculate its values.

Multi timeframe MACD - has additional parameter - TimeFrame. You can use it to set up higher timeframe from which MACD will calculate its values.

The multiple currency adviser on the indicator Stochastic.

TST

Without the display adviser.

This indicator will display current daily, weekly, and monthly percentage change.

Indicator that able to read doji with lenght set up

The Multi-currency adviser in the time, given by the user, opens a market position, on a choice Buy or Sell. As, it is possible to set closing of positions in the certain time, to choose currencies, to choose percent of the profit and loss for closing all

The adviser in the time, given by the user, opens a market position, Buy, Sell or lock. As, it is possible to set closing of positions in the certain time, and Trailing of positions.

The adviser on the indicator SAR. Works the postponed warrants.

It is possible to switch on or to switch off functions Alert, PlaySound, SendMail having moved the mouse the appropriate inscription in the basic window of the diagram.

This indicator shows you the trend on every timeframe simultaneously

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