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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 28

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 PriceChannel_Stop_Digit indicator with the timeframe selection option available in input parameters.

The CronexDeMarker_Signal indicator shows information on the current trend using the values of the CronexDeMarker indicator with a fixed timeframe.

The CronexChaikin_Signal indicator shows information on the current trend using the values of the CronexChaikin indicator with a fixed timeframe.

The BS Living Now indicator points at the market extremums and somewhat resembles the standard Fractals indicator.

A simple trend indicator with calculation of rise and fall in High and Low prices.

Semaphore signal indicator based on the algorithm of the Elliott_Wave_Oscillator indicator, which features alerts, sending emails and push-notifications to mobile devices.

Elegant and nimble comparison of 'double' values of the "price".

Indicator based on smoothed FATL and SATL digital filters and signal trend cloud between them.

The MACD histogram, based on the FATL and SATL digital filters with color indication of trends.

A grid of round price levels.

Three channels using the ATR indicator, based on one moving average, drawn as a colored cloud, with the display of the last values as price labels and the possibility to round the channel levels up to the required number of digits.

The ATR_Channels indicator with the timeframe selection option available in input parameters.

The XChannel indicator with the timeframe selection option available in input parameters.

The AFL_WinnerV2 indicator identifies a trend change by established turnover areas at -50/+50 levels.

This indicator is a hybrid of the SATL (Slow Adaptive Trend Line) digital filter and the JMA analog adaptive averaging.

The STLM digital filter implemented as a sequence of candlesticks.

Calculation of slippages of the performed deals in account currency.

The XPFE indicator with the timeframe selection option available in input parameters.

The XTrendlessOS indicator with the timeframe selection option available in input parameters.

Smoothed difference between the main and signal lines of the RVI oscillator in the form of a colored histogram.

Smoothed difference between the main and signal lines of the Stochastic oscillator in the form of a colored histogram.

Trading system based on wlxBW5Zone indicator signals.

Semaphore signal indicator based on the values of the Accelerator Oscillator and Awesome Oscillator indicators by Bill Williams, which features alerts, sending emails and push-notifications to mobile devices.

The Exp_i-SpectrAnalysis_WPR Expert Advisor is based on change of direction of the i-SpectrAnalysis_WPR indicator.

The indicator draws candlesticks of a larger timeframe as color filled rectangles using DRAW_FILLING buffers.

Semaphore signal indicator based on the algorithm of the DSSBressert indicator, which features alerts, sending emails and push-notifications to mobile devices.

Instance of the class returns such values as Bid, Ask, High, Low, Close and Open prices of the current candle or any other specified in the parameters, as well as the candle opening time.

The Exp_i-SpectrAnalysis_RVI EA is based on the signals generated by the i-SpectrAnalysis_RVI oscillator.

Semaphore signal indicator based on the relative smoothed rate of price change, which features alerts, sending emails and push-notifications to mobile devices.

The Balance of Power (BOP) indicator as a color histogram of strength and direction of the current trend.

The Exp_RAVI_Histogram breakout trading system based on the signals of the RAVI_Histogram oscillator.

Another alternative to the Bollinger Bands® channel with colored inner area of the channel.

The RAVI_Histogram indicator with the timeframe selection option available in input parameters.

The SAR Trading System illustrates the operation of the Stop and Reversal (SAR), developed by Welles Wilder. The Expert Advisor check for presence of an open position and starts moving the stop loss with parabolic acceleration.

Trading system based on Volume_Weighted_MA_StDev indicator signals.

The Volume_Weighted_MA_Cloud indicator with the timeframe selection option available in input parameters.

Semaphore arrow signal indicator based on the classic Stochastic oscillator leaving the overbought and oversold areas, which features alerts, sending emails and push-notifications to mobile devices.

The Expert Advisor works both in normal mode with one positions, and in the HEDGE mode with multiple positions.

The Volume_Weighted_MA moving average which fills the chart space with a colored background.

The Volume_Weighted_MA indicator with additional trend strength indication using colored dots based on the standard deviation algorithm.

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