"Envelope" in Metastock will do all this EXCEPT guarantee that 95% of the price is inside the envelope.
Parameters: Time periods, Vertical shift (%), Horizontal shift (Periods), MA Method and Price field.
However this is not a channel as I understand the definition.
Metastock has a Standard Deviation channel but this will change markedly as the time range is altered. Not sure this is much help.
I attach a couple of charts. AAL is of no significance only an example.
Hello peter !
Thanks again for the reply !
The Metastick envolope (as you described before) is the tool I´m using...
I was just wondering if there were other way to fix 95% of the data inside the envelope...
but I guess not....
Statistically 2 standard deviations contains 95% of the data.
This is the normal setting for Bollingers and reducing the band width to 1.8 Std.Dev. can be easily done in Metastock by changing the Band properties. A snapshot of the properties window attached here.
However NOT being a statistician I'm not sure what %age of data is included in the narrower bands?