# Bollinger Bands: Calculation and Indications.

. Bollinger Bands: How to Calculate and What They Indicate

#### How do you calculate Bollinger Bands?

Bollinger BandsĀ® are a technical analysis tool comprised of a simple moving average (SMA) and two upper and lower bands. The upper and lower bands are typically 2 standard deviations (SD) above and below the SMA, respectively. Bollinger Bands can be used to identify market conditions such as overbought/oversold levels, volatility and trend direction.

To calculate Bollinger Bands, you first need to calculate the standard deviation of the security's price over a certain period of time. The most common time periods used are 20, 21, 22, and 2. Once you have the standard deviation, you can calculate the upper and lower bands. The upper band is typically 2 standard deviations above the simple moving average, and the lower band is 2 standard deviations below the SMA.

What are the 4 basics of technical analysis? The 4 basics of technical analysis are support and resistance, trendlines, candlestick charting, and moving averages.

Support and resistance are key levels where the price of a security has a tendency to stop and reverse. They are created when the price reaches a certain level and then starts to move in the opposite direction.

Trendlines are used to identify the direction of the price movement. They are created by connecting two or more price points on a chart.

Candlestick charting is a type of chart that uses candlesticks to show the price movement. Candlesticks are created by plotting the opening and closing prices for a security on a chart.

Moving averages are used to smooth out the price data and to identify the direction of the price movement. They are created by taking the average of the prices over a certain period of time.

### What is the purpose of Bollinger Bands?

Bollinger Bands are a technical analysis tool used to measure market volatility. They are created by John Bollinger in the early 1980s. Bollinger Bands consist of a upper band and lower band which are placed two standard deviations away from a simple moving average. The space between the two bands is referred to as the "bandwidth".

Bollinger Bands can be used to measure market volatility, identify potential trend reversals, and create trading signals. When the market is volatile, the bands will widen. When the market is less volatile, the bands will narrow. Bollinger Bands can also be used to identify potential support and resistance levels.