Important legal information about the email you will be sending. By using this service, you agree to input your real email address and only send it to people you know. It is a violation of law in some jurisdictions to falsely identify yourself in an email. All information you provide will be used by Fidelity solely for the purpose of sending the email on your behalf. The subject line of the email you send will be "Fidelity. You may have done your research and decided to buy or sell.
But when is the best time to pull the trigger? Bollinger Bands are one tool that can help you decide when to make your move by illustrating the relative strength—or momentum—of a stock, exchange-traded fund, or other security.
Currently, this indicator is suggesting that stocks, broadly speaking, are overvalued on a short-term basis. Of course, you should never rely on a single piece of information to make an investment decision. It's always important to consider fundamental stock research and your particular goals, time horizon, and risk tolerance before making an investment decision. Bollinger Bands look like an envelope that forms an upper and lower band 1 around the price of a stock or other security see the chart below.
Between the two bands is a moving average, typically a day simple moving average SMA. Bollinger Bands are plotted at a standard deviation above and below a simple moving average of the price.
The upper band is the moving average plus a standard deviation, and the lower band is the moving average less the standard deviation. How can Bollinger Bands help you determine the relative strength of a stock? For example, when the stock breaks through the upper band a resistance level , it generates a buy signal. Bollinger Bands can also provide a unique assessment of volatility. Narrowing Bollinger Bands i. This squeeze can frequently be followed by a period of increased volatility, and may result in a significant move by the stock to the upside or the downside see chart above.
In the chart immediately above, the squeeze occurs around September , and is followed by an increase in price. An advanced application of Bollinger Bands involves another indicator: Bollinger Bands can be applied around the RSI line to generate additional buy and sell signals. Bollinger Band analysis holds that a failure of RSI to touch the upper band on a second try generates a sell signal. At extreme lows, a failure of RSI to reach the lower band triggers a buy signal.
This is similar to double top and double bottom patterns, respectively, that can occur for the price. You should not make an investment decision based only on the signals given by a single indicator or data point.
Fortunately, Bollinger Bands can be used in combination with different indicators, like RSI, as well as support and resistance, moving averages, MACD , stochastics, and any other research tools that may support your analysis. Most importantly, you should consider complementing technical analysis with sound fundamental analysis. As it can be said, the fundamentals can tell you what to buy or sell; the technicals can help to decide when.
Get a weekly subscription of our experts' current thinking on the financial markets, investing trends, and personal finance. Please enter a valid name.
First and Last name are required. Full name should not exceed 75 characters. Enter a valid email address. Email address must be 5 characters at minimum. Email address can not exceed characters. Please enter a valid email address. Thank you for subscribing. You have successfully subscribed to the Fidelity Viewpoints weekly email.
You should begin receiving the email in 7—10 business days. We were unable to process your request. Please Click Here to go to Viewpoints signup page.
Dow days of summer. View all Technical Analysis articles. Skip to Main Content. Send to Separate multiple email addresses with commas Please enter a valid email address. Your email address Please enter a valid email address.
Technical analysis focuses on market action—specifically, volume and price. Technical analysis is only one approach to analyzing stocks. As with all your investments, you must make your own determination as to whether an investment in any particular security or securities is right for you based on your investment objectives, risk tolerance, and financial situation.
Past performance is no guarantee of future results. Views and opinions expressed may not reflect those of Fidelity Investments. These comments should not be viewed as a recommendation for or against any particular security or trading strategy. Views and opinions are subject to change at any time based on market and other conditions. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments.
Votes are submitted voluntarily by individuals and reflect their own opinion of the article's helpfulness. A percentage value for helpfulness will display once a sufficient number of votes have been submitted. Please enter a valid e-mail address. Important legal information about the e-mail you will be sending. By using this service, you agree to input your real e-mail address and only send it to people you know. It is a violation of law in some jurisdictions to falsely identify yourself in an e-mail.
All information you provide will be used by Fidelity solely for the purpose of sending the e-mail on your behalf. The subject line of the e-mail you send will be "Fidelity. Your e-mail has been sent. Related Articles Trade by candlelight Here are 5 candlestick patterns that can help you trade the market. Dow days of summer Dow Theory can help you decide when market moves may have staying power.
Please enter a valid ZIP code.More...