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Thanks Johan.
Do you know how to code the other crieteria for the lines, i.e. the
close on the day immediately after a pivot cannot exceed the new
trendline?
I guees you would have to write something like:
supplyline=IIf(x2==0 OR valuewhen(pivothigh,ref(C,1),1)>valuewhen
(pivothigh,supplyline+((y3-y2)/(x3-x2)),1),Null,LineArray
(x2,y2,x3,y3,1));
but it can't really be done like that because I can't use supplyline
without initialising it first.
So, any ideas?
--- In amibroker@xxxxxxxxxxxxxxx, "johsun" <johanskatt@xxxx> wrote:
> Just change Cum(1)-1 to Cum(1)-2 in these lines:
>
> PlotShapes((Cross(Cum(C<demandLine AND Cum(1)-1>x1),0))
> *shapeDownArrow,colorRed,0,H);
>
> PlotShapes((Cross(Cum(C>supplyline AND Cum(1)-1>x3),0))
> *shapeUpArrow,colorGreen,0,L);
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "marmal417" <marmal@xxxx> wrote:
> > Next thing is really to remove up and down arrows from the bar
> after
> > a pivot point. Since a line is only drawn once the pivot point is
> > completed, it can't really be broken during the day immediately
> after
> > a pivot point because the line isn't drawn until after the close
> of
> > that day. Anyway, is there a way to exclude arrows from the day
> after
> > the pivot?
> >
> > Another thing Demark writes about is the reliability of lines
> which
> > are penetrated at the close the day after the pivot point. Let's
> take
> > for example a new pivot low being created. Upon completion of
this
> > most recent pivot low (higher lows on both sides) you connect the
> > second most recent pivotlow with this newformed one. As it turns
> out,
> > the line that is drawn between the two pivotlows is penetrated by
> the
> > close of the day after the most recent pivotlow, i.e. the last
day
> on
> > the chart if a new pivotlow has just been created. In that case,
> says
> > Demark, it raises the question of reliability regarding that
> specific
> > line.
> > To program this I guess you would have to calculate the slope of
> the
> > trendline and add that value to the low of the last pivotlow
> (since
> > the trendline crosses through that point) and check whether or
not
> > the close the day after is lower than the value of the line. And
> if
> > it is lower, no line would be drawn.
> > Demark writes that a close below the demand line on the day after
> a
> > pivotlow doesn't necessarily invalidate that line, but I think
> it's
> > better to assume that is the case. Because in order for the line
> not
> > to be broken the next day, the stock would have to gap up past
the
> > line again and never retrace back to the line during the day.
> >
> > Hope you understand me.
> >
> > //Martin
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