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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 114

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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 Exp_KPrmSt Expert Advisor with the entry at the intersection of the signal and the oscillator lines of the KPrmSt indicator.

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

The Triple Exponential Moving Average (TEMA) technical indicator with advanced features of setting input parameters.

The Kolier_SuperTrend with the timeframe selection option available in the input parameters.

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

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

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

The script displays the number of bullish and bearish candlesticks.

The Exp_derivative Expert Advisor is based on the breakthrough of the zero level by the Derivative indicator.

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

The Karacatica_HTF_Signal indicator shows the trend direction or the signal based on the Karacatica indicator.

The indicator performs the calculation of the derivative of the price.

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

An example of counting the number of objects in the chart window.

The Exp_KalmanFilter Expert Advisor is based on the KalmanFilter indicator color change.

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

The MultiColorZerolagJJRSXTrend_x10 indicator shows information on current trends using the ColorZerolagJJRSX indicator direction from ten different timeframes.

The MultiColorZerolagJCCXTrend_x10 indicator shows information on current trends using the ColorZerolagJCCX indicator direction from ten different timeframes.

The ColorZerolagJJRSXTrend_x10 indicator shows the ColorZerolagJJRSX oscillator direction from ten different timeframes.

The ColorZerolagJCCXTrend_x10 indicator shows the ColorZerolagJCCX oscillator direction from ten different timeframes.

The Exp_ColorSchaffJCCXTrendCycle Expert Advisor is based on the ColorSchaffJCCXTrendCycle oscillator change of position relative to the overbought and oversold levels.

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

The Schaff Trend Cycle indicator based on the difference between two JCCX oscillators with different periods.

The KAGI-1 indicator with the timeframe selection option available in input parameters.

The Exp_ColorZerolagJCCX Expert Advisor enters the market when the ColorZerolagJCCX indicator cloud changes its color.

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

This advisor demonstrates an example of global variables usage. The task of the advisor: store the calculation result in a global variable and get the global variable value on new initialization.

This variant of JCCX oscillator is calculated based on five JCCX indicators.

The JS-Stoh-BB-RSI indicator with the timeframe selection option available in the input parameters.

The Exp_ColorZerolagJJRSX Expert Advisor enters the market when the ColorZerolagJJRSX indicator cloud changes its color.

The Exp_ColorSchaffJJRSXTrendCycle Expert Advisor is based on the ColorSchaffJJRSXTrendCycle oscillator change of position relative to the overbought and oversold levels.

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

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

This indicator shows price heatmap using price histogram.

Simple TP/SL panel for MetaTrader 5.

This indicator shows the condition of the trend using the BSI Indicator.

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

The Schaff Trend Cycle indicator based on the difference between two JJRSX oscillators with different periods.

This variant of JJRSX oscillator is calculated based on five JJRSX indicators.

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

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