[amibroker] Help: Formula for getting Bollinger average, compare previous day price

["low_hanming" <low_hanming@xxxxxxxxxxxx>]

Hi,

I'm new to Amibroker and would like to test out a system that have 
such requirement.

The price must be at the top half of the bollinger envelop and today 
open price must not be lower than previous day close.

I'm having a problem getting the median of the current bollinger top 
and bottom as I could not do things like
(BBandTop+BBandBot/2)
and how do I compare today 'O' (Open) with yesterday close?

In addition, I find that yahoo groups search is very inefficient, 
does anyone knows of a better to search the archive of this group.

Thanks in advance for any reply.

Cheers.


Han Ming








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