Bollinger bands are a volatility band that is often used in technical analysis, developed by John Bollinger in the 1980s. Volatility is a variable dependent on standard deviation, and volatility increases or decreases affect standard deviation. Bollinger bands are narrowing when volatility rises and bollinger bands are decreasing when volatility is decreasing. In 2011, bollinger bands will be patented on behalf of John Bollinger. Prices for Bollinger bands are relatively high or low. According to Bollinger, tapes contain 88-89% of price movements. It is stated that the price movements of these beds out of band width bands are unusual. Technically speaking, the prices are relatively high if they are close to the high band, and the prices are relatively low when they are close to the low band. Nevertheless, the relatively high price movements should not be construed as buying or selling signals.
HOW TO CALCULATE BOLLING BITS?
Medium Band: 20-day simple moving average
Upper Bant: 20-day simple moving average + (standard deviation of 20 days price x 2)
Lower Bant: 20-day simple moving average – (standard deviation of 20-day price x 2)
HOW TO USE BOLLİNG TANKS?
An example of the bollinger band appears in the above graphic. In this example, the middle line shows the 20-day moving average. There are two lines above and below this line. Upper line; Above the standard deviation of the moving average in the middle, the bottom field line and the moving average in the middle denote the K standard deviation. In general, the standard deviation is assumed to be 2 in the bollinger bands and 20 in the period.
The most important reason for using Bollinger bands is that the financial product can be held at high and low levels and it can be predicted which band the related product will fluctuate between. In general, over-bought levels can be interpreted when a financial product touches the upper level of the bollinger bands, and over-priced levels when the lower-band holds. But alone does not give enough results. It can give meaningful results when used with Bollinger tapes and others.
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