The 4-Week High/Low Trading Strategy: A Simple Trend-Following System Explained Strategies When I first came across the 4-week high/low trading strategy, I was co-managing a...
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The 4-Week High/Low Trading Strategy: A Simple Trend-Following System Explained
Strategies
When I first came across the 4-week high/low trading strategy, I was co-managing a forex dealing room for a commodities firm. Having spent years as an interbank dealer, this was my first real introduction to technical analysis. I was never quite sure whether to use the past 20 trading days or the prior 4 calendar weeks, but since it wasn’t a strategy I planned to use actively, I just kept it on my blotter as a reference point for what long-term traders might be watching.
What Is the 4-Week High/Low Strategy?
The 4-week high/low breakout strategy is a classic trend-following system that dates back decades and is still referenced today. Its core idea is simple: buy strength and sell weakness.
The Basic Rule
- Buy Signal (Long Entry): Go long when the price closes at a new 4-week high (the highest close over the last 20 trading days).
- Sell Signal (Short Entry): Go short when the price closes at a new 4-week low (the lowest close over the last 20 trading days).
This method assumes that breaking out of a 4-week range signals a potential trend continuation.
Stop Placement
In its simplest form, this is often a stop-and-reverse strategy:
- Enter on a break above the 20-day high and reverse (or exit) on a break below the 20-day low, and vice versa.
Of course, traders have developed many variations for stop placement, but those details go beyond this article
Why Stops Are a Trader’s Lifeline in Forex Trading
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Example: Gold (XAU/USD)
In this real-time illustration, XAUUSD broke out of consolidation and closed above its 20 day high at 6407.Using the 4-week high/low strategy, it triggered a long position and fresh momentum to the upside, We give it a Gold Star as it climbed to a new record high at 3578.
Is This the Same as Turtle Trading?
Almost! The 4-week high/low breakout rule was the foundation of the famous Turtle Trading system created by Richard Dennis and William Eckhardt in the 1980s.
- Turtle Rule:
- Buy when price breaks above the 20-day high
- Sell when price breaks below the 20-day low
Turtle Trading added layers of risk management, position sizing, and secondary breakout systems (like the 55-day rule), but the core concept came from the 4-week breakout strategy.
Why Use the 4-Week High/Low Strategy?
- Trend Identification: Signals when a market is breaking out of consolidation.
- Mechanical & Objective: Removes emotion from trading decisions.
- Works Best in Trending Markets: Performs well during strong moves but can struggle in sideways/choppy markets.
The 4-week high/low trading strategy remains one of the simplest yet most powerful trend-following techniques. While it might not suit every trader, understanding it can help you:
- Identify key breakout levels
- Spot potential momentum shifts
- Improve your overall market awareness
Even if you don’t plan to trade it mechanically, adding the 4-week high and low to your charting toolbox is a smart move for any trader.
A Personal Note
While I never adopted this system, I keep an eye on the 4-week high and low levels as a reference for momentum in trending markets. Knowing where those levels sit can help traders gauge whether a market is gaining strength or showing weakness.
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