# Article-23576-Automating-Trading-Strategies-MQL5-Double-Top-Double-Bottom

This repository is an article-derived reference project based on the original MQL5 article. It does not claim to reproduce the full original source code unless files are explicitly attached.

![Article preview](https://c.mql5.com/2/237/Screenshot_2026-07-27_210600_1200x628.jpg)

## Overview

This repository is derived from the MQL5 article about automating the Double Top and Double Bottom reversal model in MetaTrader 5. The article explains how to convert a visually interpreted chart pattern into a rules-based Expert Advisor that detects confirmed swing pivots, validates the pattern with tolerance and structure filters, and executes trades on neckline breakout or optional pullback.

The project serves as a reference implementation source for traders and MQL5 developers who want to study objective pattern detection, state-machine driven entry logic, and trade management around reversal setups.

## Original Article

- **Article ID:** 23576
- **Title:** Automating Trading Strategies in MQL5 (Part 53): Double Top and Double Bottom Reversal Model
- **Author:** Allan Munene Mutiiria
- **Author Profile:** https://www.mql5.com/en/users/29210372
- **Publication Date:** Not available
- **Categories:** Trading, Trading Systems, Expert Advisors, Examples Experts
- **Article URL:** https://www.mql5.com/en/articles/23576

## Repository Purpose

This repository exists to preserve and organize the technical ideas from the article in repository form.

A reader can use it to:

- understand how double top and double bottom patterns can be formalized in MQL5
- study swing-pivot based pattern detection
- learn how to structure a pattern-trading EA with setup states such as idle, armed, and retest
- reuse the article’s architecture for experimentation, testing, or further extension in MetaTrader 5

Because this is article-derived, the practical completeness of the repository depends on the files actually attached by the original author.

## Key Concepts

- Trading
- Trading Systems
- Expert Advisors
- Examples Experts
- Double top pattern detection
- Double bottom pattern detection
- Swing pivot confirmation
- Neckline breakout confirmation
- Pullback entry logic
- Pattern validation filters
- Measured-move targeting
- Reward-to-risk target selection
- Trailing stop management
- State machine based setup handling

## Algorithm / Architecture Summary

The article describes an Expert Advisor that processes price action bar by bar and builds mechanical trading rules around reversal patterns.

1. **Detect confirmed swing pivots**
- The system confirms swing highs and swing lows using a configurable pivot length.
- Only confirmed pivots are stored, so provisional right-edge pivots are avoided.

2. **Store recent pivots in a bounded buffer**
- Confirmed swings are appended to a rolling history.
- Duplicate pivots are ignored.
- The search works only on recent pivot history.

3. **Search for a double top or double bottom**
- The newest pivot is treated as the potential second top or second bottom.
- The algorithm scans backward for a prior pivot of the same type.
- The neckline is defined by the strongest opposite pivot between the pair:
- lowest low between two highs for a double top
- highest high between two lows for a double bottom

4. **Validate the pattern**
- Peak or trough similarity is checked using a tolerance relative to pattern height.
- Minimum spacing in bars can be enforced.
- Leg balance between the first leg and second leg can be enforced.
- An optional prior-trend requirement can reject patterns that do not reverse a meaningful preceding move.

5. **Arm the setup**
- Once validated, the EA stores the pattern direction, peaks, neckline, extreme, and optional leading trend leg.
- The setup enters an armed state, waiting for neckline confirmation.

6. **Wait for breakout confirmation**
- The pattern is confirmed only when price closes through the neckline.
- If price invalidates the structure by exceeding the pattern extreme first, the setup is discarded.
- A timeout prevents stale setups from remaining active indefinitely.

7. **Optional pullback workflow**
- The EA can either enter immediately on breakout or wait for a retest of the neckline.
- In pullback mode, the setup transitions into a retest state and tracks the pullback path until price touches the neckline again or the setup expires.

8. **Open and protect the trade**
- Entry is placed at market.
- Stop loss is placed beyond the pattern extreme with a configurable buffer.
- Take profit can be calculated in two ways:
- measured move projected from the neckline
- reward-to-risk multiple based on stop distance

9. **Manage active positions**
- The EA can trail the stop once profit exceeds a configured activation threshold.
- Trailing applies only to positions associated with the EA’s symbol and magic number.

10. **Visualize the pattern**
- The article also describes drawing pattern legs, neckline, labels, breakout path, and pullback annotations on the chart for interpretation and debugging.

## Mentioned or Attached Files

### Explicitly attached files

- An attached ZIP archive is available: https://www.mql5.com/en/articles/download/23576_264386.zip?s=53ca505847b5bd14c085f94ec9cd7b658d340fceb49638e7a82c206d70f5a3bd&t=1788799540
- The internal file list of the ZIP archive was not provided in the processed input.

### Files mentioned in the article text

- `Double Top and Double Bottom.mq5`
- `Trade\Trade.mqh`

## Statistics

- **Word count:** Not available
- **Reading time:** Not available
- **Image count:** Not available
- **Code block count:** Not available
- **File count:** Not available

## Tags

- mql5
- metatrader-5
- trading
- trading-systems
- expert-advisors
- examples-experts
- difficulty-advanced

## Difficulty

**Advanced**

Reason: the article covers non-trivial pattern formalization, pivot-based signal extraction, multi-stage setup handling, configurable validation filters, order management, and trailing-stop logic in an event-driven MQL5 Expert Advisor.

## Limitations

- This repository is based on article analysis and attached-material availability rather than a guaranteed full standalone project dump.
- The full original source structure is not confirmed from the processed input beyond the file references explicitly visible in the article.
- Although a ZIP archive is attached, its internal contents were not listed in the processed input.
- Backtesting screenshots in the article do not guarantee live trading performance.
- The article explicitly presents the work for educational purposes and emphasizes testing and risk management before live deployment.
- Production readiness should not be assumed unless verified from the actual attached source files.

## Reference

- Original article: https://www.mql5.com/en/articles/23576
- Author profile: https://www.mql5.com/en/users/29210372