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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 67

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This is the largest free source code library for MetaTrader 5 platform programs. Here you can find ready-made Expert Advisors, technical indicators, scripts and libraries. Use the code library when learning MQL5 language and develop your own automated trading applications based on the provided codes.

You can freely download and test published codes, as well as launch them in MetaTrader 5. The library is also available directly from MetaTrader 5 platform and MetaEditor development environment.

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The script draws horizontal lines representing BUY (blue) and SELL (red) orders.

The MESA Adaptive Moving Average (MAMA) and the Following Adaptive Moving Average (FAMA) combination made to be multi timeframe.

Combination of MAMA (MESA Adaptive Moving Average) and FAMA (Following Adaptive Moving Average) made as an oscillator.

This indicator uses the combined values of MAMA (MESA Adaptive Moving Average) and FAMA (Following Adaptive Moving Average) to assess the trend of the market.

Instead of using Simple Moving Average it uses EMA (Exponential Moving Average), and instead of using mean deviation it uses EMA deviation (originally published here EMA Deviation).

This is a Stochastic of CCI. When Stochastic is applied to CCI and the bounds are in the fixed 0 to 100 range, the trend assessment can be done using that fact too.

End Point MA indicator uses the original formula described in the "The End Point Moving Average" article with one deviation: it is made to be "faster" (i.e., to react to market changes in a faster mode than the original version).

EMA Deviation is similar to Standard Deviation, but on a first glance you shall notice that it is "faster" than the Standard Deviation and that makes it useful when the speed of reaction to volatility is expected from any code or trading system.

Synthetic VIX indicates the increase or decrease of volatility and it should be used as that.

This version of BB Stops changes uses EMA deviation for calculation.

This version of Bollinger Bands does not use standard deviation for Upper and Lower Bands, but uses the EMA deviation.

Based on Mel Widner's Rainbow Average (that is similar to Guppy MMA), here is a binary version of Rainbow Oscillator.

The "RocketRSI" indicator by John F. Ehlers. Used to indicate strong probabilities of cyclical reversals.

The Rainbow Oscillator indicator is mainly intended to show the trend of the market. But, using the levels you can use it to assess overbought and oversold conditions too.

Unlike the basic Range Oscillator version, this version uses Bollinger Bands for overbought and oversold conditions assessment.

Range Oscillator is an indicator that shows the relative position of median price in the highest high to lowest low range for desired period.

A library to provide simple storage mechanism for expert advisors and indicators.

WPR (Williams Percent Range) based support/resistance.

A set of digital filters that are always drawn in separate window (due to their nature).

A set of 4 types of digital filters that naturally are placed on main chart.

Based on Mel Widner's Rainbow Average (that is similar to Guppy MMA), this is a sort of generalized version with quite a few extensions.

Handy functions for comparison, rounding, formatting and debugging of doubles (prices, lots and money).

Well known NonLag MA with additions and adjustments.

MACD High/Low made multi timeframe.

Ultra Trend indicator made as multi timeframe.

Indicator based on the NonLag Moving Average.

Ehlers Distance Coefficient Filter coded exactly a Ehlers described it in his book "Rocket science for traders".

This is the "zone" indicator using Ehlers Nonlinear Filter for calculation.

Ehlers Nonlinear Filter provides extraordinary smoothing in sideways markets and aggressively follow major price movements with minimal lag.

This version of Zone Trade indicator is made to show as histogram in separate window.

The indicator was described by B. Williams as fourth dimension - Trading Zone.

This version of Heiken Ashi Zone Trade indicator is made to display values in a separate window - that way it will not interfere with the other on-chart indicators and can be easier to read the states in some cases.

Heiken Ashi Zone Trade indicator is based on 3 indicators: Heiken Ashi, Accelerator Oscillator, and Awesome Oscillator.

Trend Intensity Index as described by M.H.Pee in his article "Trend Intensity Index".

This version extends the basic version of Leader of the MACD with some options that are adding more flexibility to the usage of the indicator.

Trend Strength Average uses some of the 4 regular types of averages for trend strength assessment.

Trend strength assessment based on Jurik smoothed RSI.

Trend strength assessment based on RSX.

ADXVMA Histogram is a binary version of ADXVMA indicator: instead of showing the values of ADXVMA on chart, it displays only the state of the slope of the ADXVMA in a form of a histogram.

ADXVMA uses modified ADX calculation for adapting Moving Average calculation.

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