Alright, guys! I'll try to find answers. Actually at this moment I'm struggling with Bollinger Bands, and discovering that changing the length of the bands can have quite an effect on things.
John Bollinger said that you can go to a rather small number, such as 10 days. And if you do, use a standard deviation of 1.5.
And at the other extreme, you can go longer, such as 50 days, and when doing, use a standard deviation of 2.5.
The 'narrowings' change very, very significantly depending upon the number of days used. It doesn't even follow that narrowings would necessarily *coincide*. So one would have to figure out if one should *only* select periods where you have a lot of coincidence in narrowings, or if you have to just *pick* some particular time period, regardless of narrowings coincidence.
Whew, this finding-your-own-answers business is so damn hard.
Come on guys and gals, won't ya just tell me?....
Nicholas
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