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How to Write an Expert Advisor or an Indicator

Top MQL4 and MQL5 source codes based on user ratings - 142

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A multisymbol EA. Its working algorithm is perceptron, i.e., a simple neural network). It uses indicator iAC (Acceleration/Deceleration, Accelerator/Decelerator Oscillator, AC).

The XFisher_org_v1_Candle indicator with the timeframe selection option available in the indicator input parameters

CCI Bar indicator

The MFI indicator (Money Flow Index) applied over MACD (Moving Average Convergence/Divergence) provides a visual presentation of the current price divergence

An alternative to Bollinger Bands® with the color filling inside the channel, drawn as a cloud, with the display of the last values as price labels and the possibility to round the channel levels up to a required number of digits

The Heiken_Ashi_Smoothed_VolatilityStep_Alert indicator with the ability to highlight trading time zones, selected in the indicator input parameters. Such zones are shown in a different histogram color

Extended normalized RSI - on chart version

RSI with double smoothed Wilders EMA

Corrected volatility ratio adaptive double smoothed Wilders eEMA

Exponential moving average

A script to close all market positions and/or pending orders.

Have a look here: https://www.mql5.com/en/market/product/16251

KopierMaschine is a local copier of trades between different MetaTrader 4 and MetaTrader 5 accounts in any direction located on one computer with an intuitive interface.

A static zigzag which connects the intersections of a moving average crossover

A Market Structure indicator featuring Fibonacci Intelligence to provide accurate Buy/Sell signals.

A subwindow oscillator that flags thin-participation displacement bars as "liquidity voids" and scores 0–100 how quickly price re-fills each one, distinguishing fast-absorbed noise from levels still acting as real support or resistance.

Session-range breakout EA with ATR filtering, stop-distance sizing, optional break-even/partial close, and a shared chart desk. Hedging accounts; educational source with documented execution and coordination limits.

The Expert Advisor is based on CCIT3_Simple and CCIT3_noReCalc. Crossing of the indicator's zero line is used for trading activity.

The Expert Advisor based on daily Pivot support.

Twenty lines of the Spearman's Rank Correlation indicator in one window

Trading system drawn on the basis of the signals of the TrendValue indicator

The breakthrough system using the XMA_Range_Bands indicator.

A Moving Average hybrid of digital and analog filtering.

A simple, semaphore indicator to open positions

The trend indicator with three states.

The indicator plots an equidistant channel with the calculation period defined in input parameters.

This trading system uses the BlauSMStochastic oscillator.

A trading system using the T3_TRIX indicator.

DM

A semaphore signal indicator. Four last bars are analyzed in its algorithm.

A set of support and resistance levels built on the last tops of ZigZag_NK_MTF with an option of fixing the timeframe, on which the zigzag is calculated.

The ZigZagOnParabolic indicator with the timeframe selection option available in input parameters.

The Exp_JBrainTrend1Stop EA is based on the signals of the NRTR indicator JBrainTrend1Stop.

System of receiving information concerning opened positions' current state, account, etc., as well as automatic notification about operations via ICQ.

The Shifted Moving Average allows you to shift moving average both vertically and horizontally.

The Schaff Trend Cycle indicator based on the difference between two TriX oscillators with different periods.

This indicator shows the support/resistance lines using price histogram.

Semaphore signal indicator using the trend filter algorithm based on moving averages.

The LSMA_Angle_ indicator implemented as a sequence of candlesticks

The indicator draws TriXCandle indicator candlesticks of a higher timeframe as color filled rectangles using DRAW_FILLING buffers.

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