Thanks much for the reply, Tomasz.

Ton, I think I've generally accomplished what you're inquiring about 
with the following:

--------------------------------------------

Resistance = Study("RE", GetChartID());
RECurve = exp(log(Resistance));

// plots conveniently with autoscale; doesn't produce bizarre 
vertical scaling
Plot(IIf(NOT Ref(RECurve, -1) < LowestSince(NOT IsNull(Resistance), 
L), RECurve, Null), "RECurve", ParamColor("RECurve Color", 
colorViolet), styleThick);

--------------------------------------------

I'd still like to plot a curving line on linear charts that 
was the equivalent of a ray on a log chart. Any ideas anyone?


--- In [email protected], "Ton Sieverding" 
<[EMAIL PROTECTED]> wrote:
>
> I understand that Tomasz but still have a problem. So let me put 
this question in a slightly different way. Say I have drawn a 
support line on a linear chart. Can I switch to a log chart and get 
the same linear support line just by putting an log/exp instruction 
before the line ? Giving me the same points where the price touches 
the support line ...
> 
> Ton.
> 
>   ----- Original Message ----- 
>   From: Tomasz Janeczko 
>   To: [email protected] 
>   Sent: Friday, January 05, 2007 2:23 PM
>   Subject: Re: [amibroker] log-scaled trendlines
> 
> 
>   Ed,
> 
>   Mathematically staight line in linear scale is not staight in 
log scale and vice versa.
>   These two do not mix.
> 
>   You can convert from one to another using log/exp AFL functions.
> 
>   Best regards,
>   Tomasz Janeczko
>   amibroker.com
>   ----- Original Message ----- 
>   From: "eseward_2000" <[EMAIL PROTECTED]>
>   To: <[email protected]>
>   Sent: Friday, January 05, 2007 2:00 PM
>   Subject: [amibroker] log-scaled trendlines
> 
>   > Can anyone suggest a method for producing log-scaled 
trendlines? If I 
>   > switch from linear to log scaling on a chart, the trendlines 
produced 
>   > by the ray tool, for example, are no longer visually accurate. 
Any 
>   > help/insight appreciated.
>   > 
>   > 
>   > 
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