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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 104

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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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Accumulation Distribution

Accumulation/Distribution Indicator is determined by the changes in price and volume.

Accelerator Oscillator (AC)

Acceleration/Deceleration Indicator (AC) measures acceleration and deceleration of the current driving force.

MA2CCI

Sample Trading Sistem for cross 2MA & CCI

Stdlib

Stdlib - example of library

StringsQuickSort

Example of file read and write operations

Rotating text

Easy example working with object: object creation, modification properties, redraw chart.

Three Colors

Example: Moving Average indicator filling by different colors

MACD Sample

Classical MACD Sample.

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