An Introduction to Consensus Indicators

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Jason Van Bergen

06 Jun, 2018

in Psychology

Psychology is the often overlooked intangible aspect of trading, because it is unquantifiable and generally misunderstood by most traders and investors. Unlike the precise mathematical formulas used in technical analysis, we cannot easily reduce human behavior to a mathematical equation that can be plotted on a graph as a trendline or as a series of variables that we can examine in detail, throughout history.

That said, much of the current research in social sciences is attempting to bring psychology more in line with mathematics for the precision that it gives to experimental methods. Mathematical methods are applied to behavioral science for the purpose of observing and comparing human behavior, according to a set of strict numerical criteria, the only stable benchmarks that allow comparison of behavior from person to person and from time to time.

In relation to trading and investing, we can consider two very different approaches to psychology in the markets: individual psychology and group psychology. Individual psychology obviously only looks at the behaviors of the single individual trader. Attempting to draw conclusions based on the actions of the herd, mass psychology (or group psychology or crowd behavior) examines how behavior of all investors exerts an effect on a stock price (or option price or currency value).

Go Against the Grain
The foundations of how crowd behavior relates to investing are rooted in distant history, all the way back to the famous early 17th-century Dutch tulipmania of investing folklore. Interestingly, the behavior of crowds is a paradoxical indicator when applied to stock markets. When most investors are in consensus and are driving the market in a particular direction, one naturally thinks that the consensus will continue ad infinitum and that the best trading decision is to follow the crowd.

However, history has proven exactly the opposite. When driven strongly by consensus, crowd behavior is actually a contrary indicator. When the consensus of the majority of investors or traders is strongest, the individual trader should do exactly the opposite of what the crowd is doing. The astute trader can profit by doing quite the opposite of what, at first glance, seems logical. When the market is strongly bullish, the astute trader is ready to short the market. When the market is bearish, he or she gets ready to buy.

When and How?
You would not be faulted if you were to question this strategy of trading. How do you know that the contrary trade is not going to be exactly the wrong action? Mass psychology may continue to drive the trend for a longer period of time. How can you expect to identify that exact magic moment, the single day or week, when the consensus indicator is strongest, the absolute best time that you should make your contrary move?

To answer these questions, traders must realize that a consensus indicator is not meant to be an absolutely precise indicator. Market consensus should be used as a clue that a trading opportunity is afoot. It indicates that it is a good time to apply more detailed analysis into particular stocks or currencies. It is important to find out if the trading opportunity is supported by technical analysis or momentum indicators.

The second question I raised is the more interesting one. How do you identify when the consensus is strongest? Several tools are used to help investors roughly identify the consensus of the market. Most of these tools tabulate a numerical consensus indicator on the basis of advisory opinions, including signals from the press or advertisers.

Advisory Opinion
The advisors of which I speak are ubiquitous newsletter writers who service their subscribers week-by-week or month-by-month by giving opinions on the future direction of markets or individual stocks. Sources such as Consensus and Market Vane poll these newsletters to track the bullishness or bearishness of the market. Even if the individual letter writers are blindly regurgitating whatever they hear in the media, these polling services, because they have developed special methods to analyze these newsletters, can assign either a bullish or bearish value to each of the opinion letters. These services then tabulate the overall bullishness or bearishness of their entire universe of advisors. When this numerical value crosses a certain threshold, either a buy or a sell signal is issued. The signal is issued contrary to the balance of advisory opinion.

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