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How to Write an Expert Advisor or an Indicator

Top MQL4 and MQL5 source codes based on user ratings - 77

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Trading is based on iAlligator (Alligator) and iRSI (Relative Strength Index, RSI) indicators. Alligator acts as the main indicator, while RSI is used as a trend filter.

Mikko Breakout indicator is based on a break of previous highest high or lowest low.

The trading system based on Iin_MA_Signal indicator signals

STD Trend Envelopes of Averages - multi time frame

RSI adaptive EMA - floating levels

Kaufman ama - with floating levels

Ahrens MACD

Ehlers fisher transform of rsi(OMA)

Indicator EMA HLC Envelope Oscillator

The EA uses indicator iAlligator

Standard deviation ratio adaptive EMA

Adaptive ATR channel

An Expert Advisor based on two iMA (Moving Average, MA) and iRSI (Relative Strength Index, RSI)

A trading system based on three indicators iMA (Moving Average, MA) and two indicators iRSI (Relative Strength Index, RSI)

Indicator USDX vs Slope Direction Line

The script builds the Fibonacci Levels graphical object with the option of selecting the number of its segments

Adaptive Moving Average (AMA) smoothed RSI

RSI of AMA - floating levels

Asymmetric bands oscillator

MT5 (MQL5) Version of Position Size Calculator - Based on VP Money Management rules This version has been tested and works in both versions; in MT4 (MQL4) as well as in MT5 (MQL5). See the original MT4(MQL4) only version here: https://www.mql5.com/en/code/23886 NOTE: I'm aware there appears to be an issue with the volume calculation and cross currency exchange rates. I'm working on fixing these issues.

This utility is not a trading or market information utility. This will likely only interest those writing (or debugging) indicators using multiple timeframes and collecting information using Bars (or iBars) and CopyRates. The utility creates a list showing the number of Bars reported by the "Bars" function and shows the success of CopyRates for any selected bar by displaying that bar's time from the collected data (or, it shows the error).

Trading the STRONG against the weak!

Regression Channel with variable polynomial degree - indicator for MetaTrader 5.

provides clear arrows which clearly show the direction of the currency pair.

A wick engulf candlestick pattern

Click on candlestick to see its body range, high low range, upper wick range and lower wick range value.

MQL5 version of geometric moving average.

The Swing High/Low Identifier for MetaTrader 5 marks significant swing highs and swing lows directly on your chart with color-coded arrows. This tool helps traders quickly identify key price levels, which can serve as resistance and support, and is ideal for trend reversal analysis, support and resistance mapping, and enhancing price action strategies. By highlighting these crucial swing points, it provides valuable insights for making informed trading decisions and optimizing trading strategies.

Interface for implementing asynchronous execution of algorithms

3rd Generation Moving Average is an advanced version of the standard moving average (MA) indicator for MetaTrader. It implements a rather simple lag-reducing procedure based on the longer MA period. The method was first described by M. Duerschner in his article Gleitende Durchschnitte 3.0 (in German). The presented version uses λ = 2, which provides the best possible lag-reducing. Higher λ increases similarity with the classic moving average. The indicator is available for both MT4 and MT5. It does not require using any DLL

Detrended Price Oscillator (MetaTrader indicator) — a version of the price oscillator based on the difference between the current price and the simple moving average shifted by (Period / 2) + 1 bars. Unlike the stochastic oscillator, this indicator aims to show the short-term trend changes (price waves inside the long-term trend). The indicator is displayed in the separate window of the chart. You can use this Detrended Price Oscillator (DPO) indicator in both MT4 and MT5 versions of the platform.

This MetaTrader 5 (MT5) custom indicator, boomSpikeBoxMitigationFinal.mq5, detects a specific bullish spike pattern on the chart and marks entry zones using rectangles and horizontal lines. Once the price returns to ("mitigates") the entry level, the entry line is shortened to the mitigation point.

DeltaFusion Lite is the simplified version of the DeltaFusionPro indicator for MT4. It calculates and displays Cumulative Delta and Net Delta, giving traders a clear view of buying and selling pressure within each candle. By analyzing the distribution of volume between bid and ask, it helps identify market sentiment shifts, potential reversals, and various types of divergences between price and volume.

The ColorBars Indicator paints bars with different colors depending on the volume changes. If the volume has increased, the color is green, overwise the color is red.

The example of button, created using the object of OBJ_BITMAP_LABEL type.

Trade signals based on "Bullish Engulfing/Bearish Engulfing" candlestick pattern, confirmed by Commodity Channel Index (CCI) indicator is considered. The code of the Expert Advisor based on this strategy can be generated automatically using the MQL5 Wizard.

Trade signals based on "Hammer/Hanging Man" candlestick pattern, confirmed by Relative Strength Index (RSI) indicator is considered. The code of the Expert Advisor based on this strategy can be generated automatically using the MQL5 Wizard.

The strategy is following: when outer (outside) bar appears, it checks the fact of the inner bar breakthrough in trend direction and generates a signal to open position. A module of trade signals is compatible with the new version of MQL5 Wizard.

This indicator solves an issue of the use of digital filters in the client terminal.

The indicator for multi-currency technical analysis based on the related financial assets resonances.

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