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Penny,
Here's the formula:
{BarBack Z}
{Will draw a line from one High to the next---back in time}
{Reference highs are also displayed within the window}
len:=Input("Periods for Ref High(Set > Barsback)",8,100,20);
Signal:=Ref(H,-len);
Barbk:=Input("Barsback High",1,100,8);
Signal2:=Ref(H,-Barbk);
LastBar:=Cum(1)=LastValue(Cum(1)-(len));
bacdis1:=ValueWhen(1,LastBar,LastValue(Signal));
1stRefPnt:=Ref(Ref(bacdis1,-Barbk),Barbk);
{end}
bacdis2:=ValueWhen(1,LastBar,LastValue(Signal2));
2ndRefPnt:=Ref(Ref(bacdis2,-Barbk),Barbk);
{end}
{Line Plot }
D1:=LastValue(Cum(1))-LastValue(LEN);
{D1 is first high of line}
D2:=LastValue(Cum(1))-LastValue(BARBK);
{D2 is last high of line}
P1:=1stRefPnt; {start-of-line data array}
P2:=2ndRefPnt; {end-of-line data array}
V1:=ValueWhen(1,D1,P1);
V2:=ValueWhen(1,D2,P2);
B1:=LastValue(Cum(1))-D1;
B2:=LastValue(Cum(1))-D2;
LINE:=V1-(BarsSince(Cum(1)=D1)*( (V1-V2)/(B1-B2)));
LINE;
1stRefPnt;
2ndRefPnt;
What you will need to do is first understand how the indicator works.
Notice that it plots a trendline and 2 horizontal lines. This occurs
back in time by a defined period. A lot of the indicator will not be
needed in your case but understanding how it works should help in
being able to write the type of indicator that you want. Also note
that when the indicator is not plotting a value of NA will result.
Using the Binary or Surrogate option that I mentioned before you
would have a plot of some type at all times. Hope this helps.
Preston
--- In equismetastock@xxxxxxxxxxxxxxx, "pennywat" <pennywat@xxxx>
wrote:
> Hi Preston,
>
> You are absolutely correct I do not want a continuous plot but only
> during defined periods when certains conditions are satisfied.
>
> I am willing to learn and would be grateful if you can share the
way
> you wrote your "Barsback Z" indicator.
>
> It will be interesting.
>
> Please attached the indicator and e-mail it to :-
>
> pennywat@xxxx
>
> Thanks.
>
> Penny
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, pumrysh <no_reply@xxxx>
wrote:
> > Penny,
> >
> > Your easy options are to use binary values of 1 when true else 0
> when
> > not or surrogates such as the close, high, low or open when your
> > condition is not being met.
> >
> > There is one more option which you might be able to use but you
> would
> > really need to consider whether the benefit would be worth the
> > effort. Some time ago I wrote an indicator which plotted a
> trendline
> > with support and resistance levels. The plot was not continuous
> > meaning it only plotted during the defined periods which I
believe
> is
> > what you are looking for. The indicator was called "Barsback Z".
> The
> > problem with writing such code is that IT IS NOT EASY and most
> people
> > choose the first two options that I've mentioned because of the
> ease
> > in writing the code.
> >
> > Preston
> >
> >
> >
> > --- In equismetastock@xxxxxxxxxxxxxxx, penny watson
> <pennywat@xxxx>
> > wrote:
> > > Hi Pierre,
> > >
> > > Good idea but now will have to change variable
> > > according to the number of days being viewed.
> > >
> > > Anymore ideas?
> > >
> > > All ideas are welcome.
> > >
> > > Thanks.
> > >
> > > Penny
> > >
> > >
> > > --- Pierre Tremblay <pt2000@xxxx> wrote:
> > >
> > > > Pennywat,
> > > >
> > > > You may try :
> > > >
> > > > If(V>=Mov(V,20,E),HHV(C,3), LLV(L, 250))
> > > >
> > > >
> > > > ...if you use 250 periods for display.
> > > >
> > > > Pierre Tremblay
> > > >
> > > >
> > > > pennywat a écrit:
> > > >
> > > > >Hi,
> > > > >
> > > > >Need help to plot indicator only when volume target
> > > > is met.
> > > > >
> > > > >If(V>=MOV(V,20,E),HHV(C,3),0)
> > > > >
> > > > >I have set the indicator style to dots ..........
> > > > >
> > > > >If the volume is met it plots a dot it at HHV(C,3)
> > > > else zero is
> > > > >plotted.
> > > > >
> > > > >The problem is the chart will always be zero-based
> > > > and I need to
> > > > >zoom in to see the chart clearly.
> > > > >
> > > > >Is there another way of writing this formula so it
> > > > is not zero=based?
> > > > >
> > > > >Have tried using expert highlights but cannot plot
> > > > the dot at HHV
> > > > >(C,3) when volume is met.
> > > > >
> > > > >Is there a way to plot the dot only when volume is
> > > > met else not to
> > > > >plot anything?
> > > > >
> > > > >Any ideas are welcome.
> > > > >
> > > > >Thanks.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > > __________________________________
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