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Hi Kevin,
I searched in the e-mails in this group and found one
of yours and taken to write the following:
You said:
In the book, the formula reads as follows:
CTI = ln(c/c[L])/(stdev(ln(c/c[1]),L) * sqrt(L))
where:
ln = natural logarithm
stdev = standard deviation
c[1] = yesterday's close
c[L] = close L days ago
sqrt = square root
According to the article below, there is an implied 21
day lookback period used in the book as an example.
Regards,
Kevin
This is my interpretation:
Here is the code I could write based on the above
formula. It has a lookback period variable from 1 and
up to 54 days. The trouble I see in your formula is
that the stdev can’t be of the L, it needs to be a
number, so I left the period. I do not know what it
should look like the indicator once is plotted. Have a
look at this one, and give me your feedback. I am also
interested if you do have more info about this trend
index.
Pd:=Input("Lookback Period",1,54,21);
CTI:=(Log(C/Ref(C,-Pd))/Stdev(Log((C/Ref(C,-1))),Pd))*Sqrt(L);
CTI
I haven't check your code yet. I'll have a look then
and also search as you said, but when I said translate
this page, the formula did not come up. I'll try
again.
Cheers,
Carlos
=
- Kevin <kevin_barry@xxxxxxxxxxxxxx> wrote:
> Hello Carlos,
>
> If you go to Google and search for "Chande Trend
> Index" then click on
> 'translate this page' on the very first hit, you
> will find a formula there.
>
> Here is my effort at creating the Metastock code
> from the formula on that page:
>
> Lookback:= Input("Lookback",1,100,21);
> LL:= Log(C/(Ref(C,-1)));
> XX:= LL / Lookback;
> SD:= Stdev((((LL-XX)*(LL-XX))/Lookback),Lookback);
> Log(C/Ref(C,-Lookback)) / (SD*Sqr(Lookback))
>
> Needless to say, the plot bears no relation to the
> illustration on the site.
>
> Good luck!
>
> Regards,
> Kevin
>
> At 16:25 04/11/2003 -0800, you wrote:
> >
> >Hi Kevin,
> >
> >If you send me the CTI formula I may give it a go
> and
> >help you with the MetaStock code.
> >
> >I had been looking with a Goggle search, but
> >couldn't't found any explanation really.
> >
> >Carlos.
> >=
> >
> >__________________________________
> >Do you Yahoo!?
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>
>
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