Indicator:
Bolinger Bands
Bollinger Bands Indicator
Type of Indicator
Bollinger Bands are a technical analysis tool consisting of three lines: a moving average (usually 20-period), and two standard deviations plotted above and below this moving average. It is a volatility indicator that measures the price variation over a specified period.
Purpose
The primary purposes of the Bollinger Bands indicator are to identify overbought and oversold conditions and to assess market volatility. Bollinger Bands help traders:
Determine potential reversal points,
Identify periods of low and high volatility,
Evaluate the strength and sustainability of price movements.
Calculation Method
The calculation of Bollinger Bands involves several steps:
Moving Average (MA):
Typically, a 20-period simple moving average (SMA) is used.
Standard Deviation (SD):
Calculate the standard deviation of the closing prices over the same period.
where CC is the closing price.
Upper and Lower Bands:
Upper Band: Upper Band = SMA + 2×SD
Lower Band: Lower Band = SMA − 2×SD
Trading Based on the Bollinger Bands Indicator
Bounces Off the Bands:
When the price approaches the upper band, it may indicate overbought conditions and a potential reversal downward. This is a signal to sell.
When the price approaches the lower band, it may indicate oversold conditions and…
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