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Sum() will do the job. But, Cross is not the right operator to use. Cross is only true on the bar of the actual cross. You stated that you wanted to verify that the indicator was above 0 for all the days of the period. Therefore, just use the ">" operator within the Sum function.
MyCalculation = ...;
Buy = Sum(MyCalculation > 0, 5) == 5;
To add a second condition, you will need to use an AND. You can break the logic up into as many statements as you like. But, in the end the Buy will be "x AND y" if both conditions are required to be true.
Mike
--- In amibroker@xxxxxxxxxxxxxxx, Radek Simcik <radek.simcik@xxx> wrote:
>
> would
>
> Sum(cross( macd(), 0 ),5)==5
>
> do the same job?
>
> R
>
> On Fri, May 8, 2009 at 9:31 AM, gmorlosky <gmorlosky@xxx> wrote:
>
> >
> >
> > for 5 days ago
> > buy = ref(cross( macd(), 0 ),-5);
> >
> > for each of the last 5 days
> > for (i=1,5,i++)
> > buy = ref(cross( macd(), 0 ),-i);
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx <amibroker%40yahoogroups.com>, "Rick"
> > <rickbw@> wrote:
> > >
> > > 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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