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RE: Simple question on Bollinger Bands ????



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I think we've been comparing apples and oranges here.  On one side we have a proven mathematical fact that based on a log normal distribution curve, 90% is = to 1.645 standard deviations.  There can be no argument on this because it is a solid math law.  Black and Scholes won the nobel prize with there option pricing model (which uses this function) for bringing order to the option markets.  

I think that Mr. Maas is saying that stocks don't follow a log normal distribution, or that he from his experience has found Bollinger bands work better when used differently.  I am not saying that anyone is wrong.  Please Mr. Maas correct me if I have miss-understood.  I know that there is more than one way to look at things.    

// Michael