Talk:Bollinger Bands

wrong use of Bollinger Bands explained

It says under uses,

"Other traders buy when price breaks above the upper Bollinger Band or sell when price falls below the lower Bollinger Band."

No one buys high and sells low intentionally. Perhaps the original content was trying to explain the short selling technique, at which event, it should state something like,

"Other traders sell short when price breaks above the upper Bollinger Band and settles the short position (or buys the long position to close out the short position) when price falls below the lower Bollinger Band. And yet other traders will just ride the price movements all through the band from the bottom of the band to the top."

Actually momentum traders do that sort of thing all the time, often with bands narrower and/or shorter than the Bollinger Band defaults, and in combination with other Bollinger Band indicators like BandWidth. The truth is that I am constantly surprised by the amazingly varied ways in which Bollinger Bands are used. --John Bollinger, CFA, CMT (talk) 17:40, 1 July 2020 (UTC)

Thank you very much for the reply, Mr. Bollinger. I wasn't expecting to get a reply from the man himself. Glad you're involved, and I stand corrected. I will remove this talk entry if you would like me, but it might be useful for future readers to see your comments.

And if you have the time and you're so inclined to answer a short question (for which I cannot find the answer to given my background my background in biotech), I made my own version of your bands using pinescript on tradingview, except instead 2 standard deviations, I use 3 standard deviations with ema of 20 and added additional bands using the fibonacci ratios.

So my question is:

Is there way to estimate the probability of the price reaching these fibonacci levels without having to download entire data sets from stock/forex/crypto markets and training a network on the data?

Perhaps you've heard of a group doing this work or maybe you have done such work yourself in the past? Any insight would be helpful and hope it's not too much trouble to ask.

--75.43.36.78 (talk) 06:53, 15 July 2020 (UTC)

I can't answer regarding Fibonacci levels, but if you switch to an exponential average for the middle Bollinger Band you should also switch the mean used in the calculation of standard deviation to an exponential average. That formulation is known as Exponential Bollinger Bands.

Good trading,

John Bollinger, CFA, CMT (talk) 23:25, 18 October 2022 (UTC)

The "®" sign

It seems like every reference on the Internet to Bollinger bands has a "®" sign. Is this just a marketing ploy, or should the Wikipedia page also display it? 129.180.137.98 (talk) 09:22, 18 April 2014 (UTC)

No, you don't normally use that in writing. See MOS:TMRULES. I don't think it's a marketing ploy; I'm no lawyer but I'm asuming Bollinger does it to be able to more easily enforce his trademark. I can't imagine why we'd feel the need to do it. The article mentions that it is a trademark quite prominently; that seems adequate for our purposes. ErikHaugen (talk | contribs) 19:33, 5 May 2015 (UTC)

Bollinger Bands Outside of Finance

I reverted the deletion by https://en.wikipedia.org/wiki/User:Isambard_Kingdom and corrected the broken citation. This is an important use of Bollinger Bands outside of finance that was published in a peer-reviewed journal. John Bollinger, CFA, CMT (talk) 18:08, 10 October 2015 (UTC)