McGinley Dynamic
A self-adjusting moving average that changes its own speed with the market, designed to track price with fewer whipsaws.
What the McGinley Dynamic is.
A moving average that speeds up and slows down by itself.
The McGinley Dynamic was introduced in the 1990s by John R. McGinley, a market technician. He saw it as a smoothing mechanism that tracks price, more than as an indicator.
Ordinary moving averages move at a fixed speed set by their period. The McGinley Dynamic adjusts its own speed, depending on how far price is from the line.
The aim is a line that stays close to price and avoids whipsaws. A whipsaw is when price crosses a line, then quickly crosses back.
How it is calculated.
Each new value starts from the last one, then moves part of the way to price. The custom indicator does the maths.
Start from the last value.
Like an exponential average, each new McGinley value builds on the one before it.
Measure the gap to price.
Take the difference between the latest close and the last McGinley value.
Scale the step.
Raise the ratio of the close to the line to the fourth power, then multiply by N. Divide the gap by the result. N works like a period.
Add the step.
Add the result to the last value. The line moves towards price, by more or less depending on the market.
N = the smoothing setting, similar to a moving average period
The fourth power is what makes the line adjust. When price is below the line, the ratio is under 1, so the step gets bigger. When price is above it, the step gets smaller.
So the line follows falling prices a little faster than rising ones. The effect is small when price is close to the line, and larger when the gap is wide.
How to read it.
How traders use the McGinley Dynamic. None of these is a signal on its own.
As a trend line.
Price above a rising McGinley line describes an uptrend. Price below a falling one describes a downtrend.
Fewer false crossings.
It is designed to reduce whipsaws. In a choppy market, price may cross it less often than it crosses a fast, fixed average.
Pullbacks to the line.
In a trend, some traders watch for price to pull back to the line and hold. A decisive break can suggest the trend is fading.
Choosing N.
A smaller N makes the line react faster. A larger N makes it smoother. Choose N to suit the timeframe you trade.
Common mistakes.
Where traders new to the McGinley Dynamic most often go wrong.
Treating it as a buy or sell signal. McGinley described it as a tracking line, not a trigger.
Expecting it to lead price. It adjusts its speed, but it is still built from past closes.
Judging its speed by N alone. With price near the line, a McGinley of N moves at about the pace of an EMA of 2N bars.
Installing a version without checking the formula. Some versions differ from the original, so check the source first.
Using it on MetaTrader 5.
The McGinley Dynamic is not one of MT5’s built-in indicators. You add it as a custom indicator on the desktop app.
Open the Toolbox.
In MetaTrader 5 for desktop, open the Toolbox window from the View menu and select the Code Base tab.
Find a McGinley Dynamic.
Find a McGinley Dynamic in the Code Base and download it. MT5 adds it to your terminal.
Add it to a chart.
Open the Navigator, find it under Indicators, and drag it onto the chart.
Set N.
Enter the value of N you want, such as 14, and apply it to the close if the indicator asks.
Questions, answered.
What traders ask most about the McGinley Dynamic.
01Who created the McGinley Dynamic?
02Is it an indicator or a moving average?
03Why does it move faster when price falls?
04Is it built into MT5?
05Can I practise with it first?
Practise it on a demo.
Install the McGinley Dynamic on a free MT5 demo and compare it with a simple average before trading real money.
Trading CFDs on a live account puts your capital at risk and you can lose money. A demo does not.