John Murphy's 10 Laws of Technical Trading
John's famous ten (plus one) rules that everyone should know about charting and technical analysis.
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John's famous ten (plus one) rules that everyone should know about charting and technical analysis.
Last updated
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StockCharts.com's Chief Technical Analyst, John Murphy, is a popular author, columnist, and speaker on the subject of Technical Analysis. John's essay, “Ten Laws of Technical Trading,” is a collection of recommendations John frequently offers to those who are new to Technical Analysis. They are based on questions and comments he has received over the years after speaking to various audiences. If you are confused about how to use Technical Analysis at a practical day-to-day level, these suggestions should help.
Which way is the market moving? How far up or down will it go? And when will it go the other way? These are the basic concerns of the technical analyst. Behind the charts and graphs and mathematical formulas used to analyze market trends are some basic concepts that apply to most of the theories employed by today's technical analysts.
John Murphy, StockCharts.com's Chief Technical Analyst, has drawn upon his thirty years of experience in the field to develop ten basic laws of technical trading: rules that are designed to help explain the whole idea of technical trading for the beginner and to streamline the trading methodology for the more experienced practitioner. These precepts define the key tools of technical analysis and how to use them to identify buying and selling opportunities.
Before joining StockCharts, John was the technical analyst for CNBC-TV for seven years on the popular show Tech Talk, and has authored three best-selling books on the subject: , , and .
In The Visual Investor, John demonstrates the essential visual elements of technical analysis. The fundamentals of John's approach to technical analysis illustrate that it is more important to determine where a market is going (up or down) rather than the reason behind its direction.
Study long-term charts. Begin a chart analysis with monthly and weekly charts spanning several years. A larger scale map of the market provides more visibility and a better long-term perspective on a market. Once the long-term has been established, then consult daily and intra-day charts. A short-term market view alone can often be deceptive. Even if you only trade the short term, you will do better if you're trading in the same direction as the intermediate- and longer-term trends.
Determine the trend and follow it. Market trends come in many sizes – long-term, intermediate-term and short-term. First, determine which one you're going to trade and use the appropriate chart. Make sure you trade in the direction of that trend. Buy dips if the trend is up. Sell rallies if the trend is down. If you're trading the intermediate trend, use daily and weekly charts. If you're day trading, use daily and intra-day charts. But in each case, let the longer range chart determine the trend, and then use the shorter term chart for timing.
Find support and resistance levels. The best place to buy a market is near support levels. That support is usually a previous reaction low. The best place to sell a market is near resistance levels. Resistance is usually a previous peak. After a resistance peak has been broken, it will usually provide support on subsequent pullbacks. In other words, the old “high” becomes the new low. In the same way, when a support level has been broken, it will usually produce selling on subsequent rallies – the old “low” can become the new “high.”
Measure percentage retracements. Market corrections up or down usually retrace a significant portion of the previous trend. You can measure the corrections in an existing trend in simple percentages. A fifty percent retracement of a prior trend is most common. A minimum retracement is usually one-third of the previous trend. The maximum retracement is usually two-thirds. Fibonacci Retracements (1) of 38% and 62% are also worth watching. Therefore, during a pullback in an uptrend, initial buy points are in the 33–38% retracement area.
Draw trend lines. Trend lines are one of the simplest and most effective charting tools. All you need is a straight edge and two points on the chart. Uptrend lines are drawn along two successive lows. Down trend lines are drawn along two successive peaks. Prices will often pull back to trend lines before resuming their trend. The breaking of trend lines usually signals a change in trend. A valid trend line should be touched at least three times. The longer a trend line has been in effect and the more times it has been tested, the more critical it becomes.
Follow moving averages. Price moves above or below moving averages provide objective buy and sell signals. They tell you if the existing trend is still in motion, and they help confirm trend changes. However, moving averages do not tell you in advance that a trend change is imminent. In stock trading, the three most important ones are the 20-day average for short-term trends, 50-day for intermediate trends, and 200-day for major trends. Crossings of two moving averages also provide trading signals. Three popular combinations are 5–20 days, 20–50 days, and 50–200 days. Exponential moving averages (EMAs) are usually more suitable for spotting moving average crossings.
Don't ignore volume. Volume is a very important confirming indicator. Volume precedes price. It's important to ensure that heavier volume is taking place in the direction of the prevailing trend. In an uptrend, heavier volume should be seen on up days. Rising volume confirms that new money is supporting the prevailing trend. Declining volume is often a warning that the trend is near completion. A solid price uptrend should always be accompanied by rising volume.
Technical analysis is a skill that improves with experience and study. Always be a student and keep learning.
- John Murphy
1) Leonardo Fibonacci was a thirteenth-century mathematician who “rediscovered” a precise and almost constant relationship between Hindu-Arabic numbers in a sequence (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, etc. to infinity). The sum of any two consecutive numbers in this sequence equals the next higher number. After the first four, the ratio of any number in the sequence to its next higher number approaches .618. That ratio was known to the ancient Greek and Egyptian mathematicians as the “Golden Mean” which had critical applications in art, architecture and in nature.
Track oscillators. Oscillators help identify overbought and oversold markets. While moving averages confirm a market trend change, oscillators often help warn us that a market has rallied or fallen too far and will soon turn. The and are popular oscillators. They both work on a scale of 0 to 100. With the RSI, readings over 70 are overbought, while readings below 30 are oversold. The overbought and oversold values for Stochastics are 80 and 20. Most traders use 14 days or weeks for Stochastics and either 9 or 14 days or weeks for RSI. Oscillator divergences often warn of market turns. These tools work best in a trading market range. Weekly signals can be used as filters for daily signals. Daily signals can be used as filters for intra-day charts.
Trade the MACD indicator. The (developed by Gerald Appel) combines a moving average crossover system with the overbought/oversold elements of an oscillator. A buy signal occurs when the faster line crosses above the slower and both lines are below zero. A sell signal takes place when the faster line crosses below the slower from above the zero line. Weekly signals take precedence over daily signals. A MACD histogram plots the difference between the two lines and gives even earlier warnings of trend changes. It's called a “histogram” because vertical bars are used to show the difference between the two lines on the chart.
Use the ADX indicator. The helps determine whether a market is in a trending or trading phase. It measures the degree of trend or direction in the market. A rising ADX line suggests the presence of a strong trend. A falling ADX line suggests the presence of a trading market and the absence of a trend. A rising ADX line favors moving averages; a falling ADX favors oscillators. By plotting the direction of the ADX line, the trader is able to determine which trading style and which set of indicators are most suitable for the current market environment.