Summarize this article about trading with triple moving averages:
The goal of the triple moving average strategy is to capture the price movement in a trend. To avoid unnecessary complications, our examples will focus on using the strategy in a bullish direction. But once you understand the concepts, you can alter and apply the concept in a bearish direction.

In our examples and back test, we provide the results of buying long stocks and selling them later for a profit. However, you can use any number of options strategies to capitalize on this price appreciation.

There are variations of the triple moving average strategy with a lot of room for flexibility. The strategy that we will present to you today is based on what was described in John Murphy’s book “Technical Analysis of the Financial Markets: A Comprehensive Guide to Trading Methods and Applications.” Therein he writes that, “The most widely used triple crossover system is the popular 4-9-18-day moving average combination.”

4-9-18 Moving Average Combination
To implement the triple moving average strategy, first one must plot these three moving averages on a chart:

The fast one: 4-period simple moving average.
The medium one: 9-period simple moving average.
The slow one: 18-period simple moving average.
The signal to go long and capture the start of a bullish trend is seen when the fast-moving average crosses up through the slow-moving average. Here on a daily chart of Honeywell International (HON), we see on Feb. 10, 2021 that the orange four-day simple moving average crosses up and above the blue 18-day simple moving average. This is a buy signal.

triple moving average crossover

Note that you would want the orange line to cross up through and above the blue line — you would not want the orange line to cross down and below the blue.

Exit Signal
When the four-day simple moving average crosses either of the other two moving averages, this is the signal to exit the position. Usually, it will be the four-day average crossing down below the nine-day average. This occurred on March 23, and served as the exit signal.

Think of the fast-moving average as the signal line, and we act when it crosses the other moving averages. For the purposes of our back test, we will assume the investor bought and sold at the closing price and will buy enough shares to take on an approximate position size of $5000. With 25 shares of HON bought at $202.16 and sold at $208.59, the investor made a profit of $160.75 on this trade.

Wait For Space Separation
The astute reader may question why we bought on Feb. 10 when the cross happened on Feb. 9. We want to make sure that the moving averages make a “decisive” crossover, not an ambiguous or tentative one. So, we may sometimes wait a day to ensure that there is space separation between the two moving average lines before taking action on the signal. The same is true of the exit signal.

Note that in early March, the orange and green moving averages commingled, crossing back and forth without clear separation between the two. We ignored these signals and did not exit until we saw a clear separation of the orange line going below the green line on March 23.

Back Test Results
For the back test, we looked for crossovers in the Dow Jones Index stocks at random points in the timeline between the years 2018 and the early part of 2021.

triple ema crossover

The results showed 9 losses with an average loss of $74. There were 21 wins with an average win of $430. In aggregate, the back test profited $8370. The losses were well-contained with no large losses. On average, the size of a win is larger than the average loss. In addition, the strategy captured and profited from two long bullish trends — namely BA and GS.

In investing, you can have small wins, small losses, big wins, and big losses. The goal of a profitable strategy is to eliminate the big losses.

triple ema crossover strategy

You are then left with small wins, small losses, and big wins — this gives you a winning strategy because you have more wins than losses, and the average wins are larger than the average losses.

The Finer Points
In Murphy’s book mentioned earlier, he says the buy signal is when the four-day crosses above both the nine-day and the 18-day averages. We simplified it to watching the four-day crossing the 18-day because we found that when that happens, the four-day would have already crossed the nine-day in most cases.

Murphy also says that this first signal is an alert, and that the confirmation signal to buy is to wait for the nine-day to cross above the 18-day. We found that it was not necessary to wait for this confirmation in favor of getting into the trend earlier. We saw that when the first cross happens, the second confirmation cross will also occur more often than not.

Expanding Moving Averages
Look at the chart of Procter & Gamble (PG) on Jan. 24, 2019, where the three moving averages are expanding from a single point.

triple ema strategy

This is a high probability, very bullish pattern in the early stage of an uptrend.

Can We Use Other Moving Averages?
Is there something magical about the 4-9-18 moving average combinations, or can other moving averages be used? Why not use the more common 20-moving average and 50-moving averages that many technical analysts already have on their charts? Here are the results of the same strategy using the 9-20-50 simple moving averages.

3 moving average strategy

While it was still profitable, it did not do as well. The win-loss ratio was not as good, and the average loss was closer in magnitude to the average win. It appears that this set of slower-moving averages is not sensitive enough. It picks up the trend a little late, and it exits a little late.

Conclusion
The 4-9-18 triple moving average strategy is a good one. It embodies a couple of key trading maxims:

The trend is your friend — until it ends.
Cut your losses short and let your winner run.
Because it has clearly defined buy/sell rules, it takes the emotion out of the picture and forces the investor to live by the maxims. It helps the investor stay in a trend until there is a clear sign of it ending. This avoids early profit-taking that limits reward potential.

It forces the investor to cut losses early. When the four-day moving average crosses below the nine-day moving average, the investor must exit the position. There is no interpretation or ambiguity. It is a trend-following strategy. Hence it does better in trending markets than in ranging markets.