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How to Write an Expert Advisor or an Indicator

MQL4 Source Code Library for MetaTrader 4 - 79

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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You never see like this indicator before. This indicator draw Dayly RSI Level on your chart like CAMERILLA and Pivot. The levels is very powerful and very matchful. Try it quickly.

Disparity Index indicator is a percentage display of the latest close to a chosen moving average. For more in depth interpretation of the Disparity Index refer to Steve Nison's book "Beyond Candlesticks".

This code is simple variation of Bollinger Bands code which comes with Metatrader4, if we change Standard Deviation by ATR we have StarcBands.

This Indicatro Draw Weekly CAMERILLA Levels H1 H2 H3 H4 L1 L2 L3 L4 with back test.

This Indicator Draw Dayly CAMERILLA Levels H1 H2 H3 H4 L1 L2 L3 L4 with back test.

The Expert Adviser Frank_ud all time in the market in both sides.

This indicator Draw True Weekly Pivot Line and seven levels Up ( R1,R2,R3 ... ) and seven levels Down ( S1,S2,S3 ...).

This indicator Draw True Pivot Line and seven levels Up ( R1,R2,R3 ... ) and seven levels Down ( S1,S2,S3 ...) with back test.

This script will plot Fibonacci golden spiral on the chart.

This indicator will plot Fibonacci golden spiral on the chart.

Indicator MadroGoldenFilter gives four signals to filtering 4 strategies.

Indicator Waddah Attar Trend is very simple , very easy to use and very sensetive to buy and sell signals.

This Script creats HTML Report To Your Current Chart. It contains a usefull information. Try it.

Just draw Trend Up or Trend Down before the Expert Advisor "TrendMeLeaveMe" start. Set properties, run expert and go to sleep or work.

This indicator puts Prices at Fibo lines.

This indicator shows symbol index with two MA.

This indicators shows Bears Power and Bulls Power in easy way at one window.

This indicator shows ADX indicator in another easy way. Buy when Bars is Green, Sell When Bars is Red.

Indicator Waddah_Attar_Explosion is very powerful. It alerts you to buy , sell , exit buy and exit sell.

Hello everyone, this is my first contribution to this lovely place. This expert advisor that catches the gaps. Really I like to thank this company for here efforts in making all these options and facilities that help the traders.

Get all the Account and MarketInfo details for a currency pair at a glance.

A kind of hedging style play base on "BaseSymbol" and hedge "Hedge.Symbol" to reduce the risk including the auto-calculate-correlation-function for all BaseSymbol-Hedge.Symbol.

Quckly generate histoircal data from any M1 data such as alpari for all time frames up to D1. Shift Time to suit your server.

Artificial Intelligence expert advisor.

Contrarian trade using MA indicator And Trendfollow trade using Breakout system

The Indicator ang_AZad(C) helps to define the dominant trend as ang_Zad(C).

The Indicator ang_Zad(C) helps to define the dominant trend.

Indicator ang_PR (Din)-v1 represents an indicator based on polynomial regression.

The Indicator ang_AutoCh_HL-v1 automatically forms up the equidistant price channel from givenned points.

The purpose of this indicator is to identify market fases that have too small amplitudes. These fases are useless even for systems designed for trading ranges markets. When the green line is BELOW the gray line - DON'T trade.

The Expert Adviser ZeroLagEA-AIP v0.0.4 uses for calculation of the signal indicator ZeroLag MACD, which is an indicator Moving Average Convergence/Divergence, MACD with zero delay.

The Indicator DS_Stochastic presents an original Stochastic Oscillator (Stoch), in which aplying EMA smoothing.

The Indicator ZeroLag Stochs_true is an George C. Lane’s indicator Stochastic Oscillator (Stoch) with zero delay.

The Indicator Fast Stochastic is a kind of George C. Lane’s stochastic oscillator.

The Indicator ZeroLAG MA is a moving average with zero delay. The Indicator ZeroLAG MA was described in journal Technical Analysis of Stocks and Commodities, April, 2000 for the first time.

The Indicator ZeroLag MACD is an indicator Moving Average Convergence/Divergence, MACD with zero delay.

The Expert Adviser 10 points 3 uses the histogram of the standard indicator Moving Average Convergence/Divergence, MACD.

Point & Figure Charts (P&F) differ from normal price charts through that they fully ignore the time values and only show changes in prices.

Being one of indicators of group NRTR (Nick Rypock Trailing Reverse), the NRTR WATR indicator is a dynamic price channel adapted by volatility.

Indicator SHI_Channel_true shows Barishpolts' dynamic moving channels in the chart in automated mode.

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