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The investors with a long-term horizon, such as pension funds, select and monitor investments based on an analysis of the outlook for the macro-economic environment, the sectors in which companies operate, and their core values. Many daytraders use the Bollinger Bands Indicator. When the market is within a directional phase, however, volatility increases and the two bands move away from prices. When the market moves sideways, volatility decreases and the two bands squeeze around prices. Two bands, one upper and the other lower, which expand and shrink automatically, depending on the volatility expressed by the market.A central moving average, usually calculated over 20 periods, following the primary trend expressed in prices.The Bollinger bands consist of a central moving average and two oscillation bands, which move according to the volatility on the market. What is obtained is then added and subtracted from the value of the central moving average to obtain the value of the Upper Band and the Lower Band, respectively. This value is multiplied by two to exploit the static principle of Gaussian. The standard deviation is calculated by summing the deviations from the mean, then elevated to the square. In particular, the two bands have the ability to adapt automatically to the primary trend followed by prices, while the concept of standard deviation is used to measure volatility. One of the oscillators used for this purpose is the Bollinger Bands, the most important feature of which is to expand and shrink automatically as volatility changes. In order to try to anticipate the beginning of a directional movement, it is necessary to identify those situations in which there has recently been a marked contraction in volatility. In particular, after a period of low volatility, when prices moved laterally, within a narrow trading range, there are frequent and sudden accelerations (breakouts). Most of the quantitative indicators used by technical analysts to study the behavior of financial markets are based on the assumption that prices have a repetitive trend.