The adviser for trade David Lendry is the head of firm on management of money “Sentive Trading” and the head of a hedge fund “Harvest Capital Management”. David Lendry has set of author’s systems of trade, including System of break 2/20 EMA and a method of explosion of variability.

Traders never get far from concept of variability, whether it is because of technical factors or because of news. We hear about it all the time: intra-day traders report that variability is their best friend when it gives possibilities for short-term trade while long-term investors always keep enough with watchfulness and try to wait the latest period of variability while the situation again won’t calm down. It is not surprising that many traders have problems with understanding of what actually means variability and as it influences their trade.

That it is better to understand this prominent aspect of trade, at first we will consider that from itself represents the variability.

We also will consider general methods of application of these concepts in the markets. In the future, we will consider more difficult measurements of variability and more certain methods of trade.

Simple concept

From the mathematical point of view, variability is one of the most difficult market concepts. But it at all doesn’t mean that it should be difficult for understanding in the conditions of practical trade. Variability is a simple indicator of how the price for the given period of time changes. For example, if Dow Johns’s index has risen on 10 points in one day and has decreased on 10 points on following you for certain would tell that variability is low. However, if it has risen on 200 points in one day and has decreased on 200 points on following you possibly would tell that the market is changeable.

In most common features, it all is valid. More detailed and difficult material concerns consecutive measurement of variability, tracing its behavior, and using it in the trade.

Variability characteristics

Variability has some features inherent in it: recurrence, constancy and returning to average value. Though it can sound at first not clearly and difficult, besides, concepts, actually, are rather simple.

Variability is cyclic: Variability tends to move in cycles, increasing and reaching peak, then decreasing, while it does not reach the bottom limit and process is started over again and again. Many traders believe that variability is more predicted, than the price (because of this characteristic of recurrence) and develop model to trade, being based on this phenomenon.

Variability is constant: the Constancy is simple capability of variability to follow from one day to the following assuming that variability which exists today, it will probably also exist and tomorrow. That is if the market very much volatative today it is the most probable that it will be like this tomorrow; on the contrary, if the market is not changeable today, that, possibly, it won’t be changeable and tomorrow. In the same image if variability increases today, that, possibly, it will continue to increase tomorrow and if variability decreases today, that, possibly, it will continue to decrease tomorrow.

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