[amibroker] AFL for Buy statement

["Rick" <rickbw@xxxxxxxxxxx>]

As a new user, can someone help me understand how to set up a buy signal when a certain condition occurs on several consecutive days?

I would like to create a buy signal when (as example) the macd is above 0 for the last 5 days.

I know that the correct afl for when macd is above 0 for the last bar = 

buy = cross( macd(), 0 );

but how do I create the same buy afl for the last 5 days?

also if I want to add another condition (but for a different set of days) would I add an "AND" or would I need another afl line?

Thanks for any help provided.



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