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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 87


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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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.

MTF_Bbands indicator. Uses indicator BBands.

MTF_MAChnl810_Env indicator.

Delta indicator.

MTF_FibBreakout1.3 indicator. Uses indicator Stochastic.

Advanced_ADX indicator.

Macd_CJA M1D1 indicator. Uses signals Macd.

MACD_4in1_v2 indicator. Four in one.

Float indicator.

GMacd_Signals indicator. Will approach as the filter.

MTF-Dinapoli_Target indicator. Works together with DinapoliTargets.

Synergy Signals [v2] indicator.

RSIOMA_v2 indicator.

Color Stochastic indicator.

Chaikin's Volatility (2 lines) indicator.

Stodiv indicator.

Bollinger Squeeze_v9 indicator.

Stoch_Sound_Email indicator.

SpudFibo indicator.

This indicator shows support and resistance lines based on fractals.

Indicator T3 RSI.

Functions for processing the orders of Spot currency pairs, Spot Gold and Spot Silver with error handling. Revision 1: OrderModify2() & OrderProcess() corrected, OrderProcess() & OrderSend2() enhanced.

Indicator EA Vegas 1hr.

Indicator MTF CCI.

Indicator ITrend.

Indicator T3 RSI.

Indicator T3 CCI.

Indicator Trading hours.

Indicator TSD PP MACD FORCE Ind v1.


Indicator MC.

Indicator iAnchMom.


Indicator VTS.

Indicator WcciChart.

Indicator SmoothCandle S v1.00.