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How to Write an Expert Advisor or an Indicator

MQL5 Source Code Library for MetaTrader 5 - 47


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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Multi pass average filter

Super smoother levels

Super smoother

This calculates Optimal f using the Geometric Mean. Per Ralph Vince, "In trading we can count on our wins being for varying amounts and our losses being for varying amounts. Therefore the Kelly formulas could not give us the correct optimal f." So, using his equation(s), I created this library for the Geometric Mean version of Optimal f.

Triple fast ema Hull

Fast ema Hull average

Fast EMA

T3 stripped

Laguerre RSi with Laguerre filter - extended

JMA Z-score

Headley's acceleration bands

ATR adaptive JMA


CCI T3 based with floating levels

Corrected RSX

Expert advisor uses the difference between bar closes and a close moving average to detect unusual activity, it will then buy arbitrary volatility spikes. This is a prototype that I will be expanding on in the future, at the moment the user can input an arbitrary level to buy at. In future developments I plan on building a neural network in the EA that detects and compares volatility levels.

RSX of adaptive lookback average

Jurik smooth on chart generic trend

Short description.

Great indicator for Time series analysis as shows stationary properties. Indicator calculates the difference between a 14 period Double exponential moving average and price closes. Great to help identify unusual price activity.

RSX range expansion index - with confidence bands

RSX range expansion index - with floating levels

RSX range expansion index

Synthetic RSX

Cuttlers RSI adaptive EMA ribbon

Cuttlers RSI adaptive EMA

DWMA with JMA oscillator

DWMA with JMA ribbon

Double weighted moving average

Mogalef bands

Schaff trend CCI

Pearson coefficient

Short description.

Step chart of stochastic of averages

Step chart of stochastic

Step chart of CCI of averages

Step chart of CCI

Step chart of RSI

Step chart of averages