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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 85


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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Adviser Surefirething.

Adviser suffic369.

Adviser StrategyTester Ea.

Adviser Starter v6mod. Uses indicator EMA Angle Zero.

Adviser Universal MA Cross EA.

The adviser on a method of channels.


Adviser TTT.

Adviser Terminator. Uses indicators I_Trend and Support and Resistance.mq4.

Adviser Volume trader.

Adviser Vlado. Trade on values of indicator Williams' Percent Range (%R)

Adviser RPM5_MT4_[ea].

Adviser Donchain counter-channel system. Uses indicator Donchian Channels - Generalized version1.

October 2005 Issue - "FRAMA - Fractal Adaptive Moving Average" Length will be forced to be an even number. Odd numbers will be bumped up to the next even number.

FiboPiv_v2 indicator.

Indicator TDI-With Alerts. The description look in a code.

The modified version of indicator Qualitative Quantitative Estimation.

Trendlines Day indicator.

Inout indicator.

Custom Linear Regression Tool. Values of LR line and Support and Resistance lines are in buffers.

Labtrend1_v2 indicator.

Fibonoacci trading Expert Advisor for MetaTrader 4.


Indicator MBA. Uses signals of indicators: MACD, Stochastic, RSI, Momentum.

Expected Volumes indicator.

BB_Prc indicator.

Advanced Get Oscillator indicator.

Fisher_m11 indicator.

MTF_Williams Percentage Range indicator.

Qualitative Quantitative Estimation indicator. Uses indicator RSI.

NonLagZigZag_v2 indicator.

Indicator BobokusFibo. The modified version of indicator SpudFibo.

Chin Breakout Alert indicator.

Solar wind clean X indicator.

Indicator RSI with Trend Catcher signal.

MTF_Stochastic indicator.

MTF_MA-4H indicator.

CCI_Woodies_Lnx_v3_1 indicator.

Doublecci Woody indicator.

T3 Alpha indicator.

Velocity_v2 indicator.

WildersDMI_v1 indicator.