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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 73

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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Indicator CADX

Indicator AFStar.

Indicator AV

Indicator Ask Shadow

Indicator ^Pivot_ResSup

Indicator ^Pivot_PP

Indicator Volume with Custom Moving Average

Advisor MostasHaR15 Pivot.

Advisor LBS V 1.0.

Advosor JK sinkhro. Enough the simple adviser.

Indicator MTF CCI

Indicator Dinapoli.

Indicator 3perekosa

i-Gap indicator.

HVR indicator.

It is NRTR indicator, in which candlesticks are painted in accordance with the mutual positions of Alligator lines.

Center of Gravity is an oscillator developed by John F. Ehlers and presented in his article in Stocks & Commodities magazine (May 2002).

Spearman's Rank Correlation is a non-parametric method used in order to make statistical studies of relations between phenomena. In this case, the factual degree of parallelism between two numeric sequences will be detected.

There are many algorithms of smoothing. This given indicator is for smoothing of standard indicator ADX. The code was translated from Easy Language.

Optimized variant of the indicator DT_ZZ by klot.

Hour indicator.

Adaptosctry indicator. Works with indicator FATL.

Advosor Graal-Crossmuvingi. Uses indicators Momentum and Ma.

Indicator DEMA RLH.

Triple exponential smoothing is used in this indicator.

DigitalF-T01 indicator.

FoxPivot indicator.

Ergodic Ticks Volume Indicator.

Custom Graal indicator.

FP indicator.

Indicator TrendOSC

Indicator Bykov Trend Sig

i4 Pivot_v1 indicator.

i-SKB-F indicator.

i-Pass Lev CCI_v.1.2 indicator.

Indicator slow-stich

Indicator The 20's v0.20

KAGI-1 indicator.

J_TPO Velocity indicator. The modified version of the indicator J_TPO Clean.

Inercia Bars indicator.

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