[amibroker] When I should put "buy = 0" in scan mode

["Kevin" <stock138@xxxxxxxxx>]

Hi guys,

1. I am reading IntroToAct article. Sometimes, it require "buy = 0" in scan mode, sometimes it's not. 

When I should use "buy = 0" when I use addtocomposite in scan mode ?

2. BTW, I couldn't fully understand the following in "IntroToAct" article.

"AddToComposite function also detects the context in which it is run
(it works ONLY in scan mode) and does NOT affect composite ticker
when run in Indicator or Commentary mode, so it is now allowed to
join scan and indicator into single formula."

At first, it said it works ONLY in scan mode. At last, it said it is now allowed to join scan and indicator into single formula.

What does it really mean ?


Thank you.

Kevin



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