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<SPAN
class=817135213-05122003>Thanks for the idea Graham, I'd never thought of use
styleCandle to do anything but OHLC. I modified your code to provide a variable
threshold for the histogram without changing the actual values displayed, so the
title readout is correct, and wrapped it up as a function.
<SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003>Check this out (watch for line wrap as
usual):
<SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003>===========
<SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003>function PlotVariableHistogram(array, threshold, label,
pos_color, neg_color) { xO = threshold; xC =
array; xH = Max(xO, xC); xL = Min(xO, xC);
<SPAN
class=817135213-05122003> color = IIf(array >= threshold, pos_color,
neg_color); PlotOHLC(xO, xH, xL, xC, label, color,
styleCandle);}
<SPAN
class=817135213-05122003>r = RSI(14);//Plot(r, "RSI",
colorBlue);
<SPAN
class=817135213-05122003>thresh = Param("Threshold", 50, 0, 100,
1);PlotVariableHistogram(r, thresh, "RSI", colorBrightGreen,
colorRed); // use candle colors from prefs
<SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>===========
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003>A pair of
related questions, if anyone knows:
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003>- Is there any way to
set the candlestick fill colors from AFL? Or are the colors from prefs always
used?
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003>- Is there any way
to find out or make use of the colors set in preferences for various things?
Like we can use Prefs() to get various other numeric preference settings? The
only thing I know of is to set all your prefs colors to some custom color, which
can then be referenced as colorCustom1, colorCustom2, etc., but I was wondering
if we could use the prefs settings directly, whether they were custom colors or
not.
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>Thanks,
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>Dave
<SPAN
class=817135213-05122003><SPAN
class=817135213-05122003>
<BLOCKQUOTE
>As
I said there may have been an error as I type it on the fly. I was
usingcandles to plot the histogram of RSI. This will use your candle set
coloursin preferences for the values.Here is the corrected code
xO = 0;xC = RSI(14) - 50;xH = Max(xO,xC);xL =
Min(xO,xC);PlotOHLC( xO,xH,xL,xC,"" , colorBlack,
styleCandle);Cheers,Graham<A
href="">http://groups.msn.com/asxsharetrading<A
href="">http://groups.msn.com/fmsaustralia
-----Original Message-----From: Dave Merrill
[mailto:dmerrill@xxxxxxx] Sent: Thursday, 4 December 2003 9:43 PMTo:
amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] Histogram centered
around a non-zero valueThanks for the ideas; the second one works
well. I rewrote it slightly likethis:r = RSI(14);Plot(r - 50,
"", colorwhite, stylehistogram);bgcolor = colorLightGrey;Plot(r, "",
bgcolor, stylehistogram+styleNoLabel+styleNoRescale);Does anyone know
if we can access the colors set up in preferences throughAFL? That'd be a
better way to go than hard coding the background color. Iknow about the
Prefs function, but as far as I can see, it doesn't includegetting back
preferred colors.I couldn't figure out what you were up to with your
first idea. Not what I'mlooking for as written, but maybe there's
something in there. Doesn't matterthough, since the second one works fine,
and is simpler too.Thanks again,Dave> There are
2 ways you could achieve this>> xO = 50;> xC = RSI(14) -
50;> xH = max(xO,xC);> xL = min(xO,xC);> PlotOHLC(
xO,xH,xL,xC,"" ,colorblue,stylecandle);>> Or>>
Plot( RSI(14)-50,"",colorwhite,stylehistogam);//your backghround >
colour Plot( RSI(14), "", colorblue, stylehistogram);>>>
I have just typed these out, hoping they work, but may have some typo >
errors>> Cheers,> Graham>>> What's
the easiest way to plot something that looks like a histogram, > but
has the bars extending up and down from some value other than > zero?
For instance, suppose you wanted to plot RSI above and below 50. > You
could subtract 50 and use a normal histogram, but that makes the >
readings in the title, tooltip and to the right of the graph
wrong.>> Is there a simple solution I'm not thinking
of?>> Thanks,>>
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