This week, we are going to continue with our "key technical indicators" series for stocks or any publicly traded instrument for that matter. Today, we are going to explore "Bollinger Bands".
Bollinger bands are a volatility indicator that depict two deviations from a moving average in the price trend of a stock, commodity, fund etc. This is depicted as two lines on either side of a moving average indicator which represent the outer (upper and lower) bands from the moving average. When a stock, on the upside, rises above the outermost upper band as in the chart on the left this can indicate the stock is over bought and may be an opportune moment to sell. Likewise, if the price trend falls below the outermost lower band, it can indicate the stock is over-sold and may be an opportune moment to buy.
As with any technical indicator, these can be used over different trading timelines whether this is intra day, daily, weekly, monthly or any timeframe you may choose. Their relative significance will also vary by the timeline you choose and as always are useful to use in combination with other technical indicators and values.
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