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Sorry,
Dave, I don't read all the posts ;-) nice to see your code!
<FONT face=Arial color=#0000ff
size=2>
What
would be nice is to be able to "create" static stock data from bar
zero... (without scripts) so that the entire AB system behaves as it would
normally seeing a stock with n bars.
<FONT face=Arial color=#0000ff
size=2>
take
care,
<FONT face=Arial color=#0000ff
size=2>herman
<FONT face=Tahoma
size=2>-----Original Message-----From: Dave Merrill
[mailto:dmerrill@xxxxxxx]Sent: Monday, July 26, 2004 9:12
AMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker]
Training mode.Importance: High
<SPAN
class=129330813-26072004>Thanks for your reply Herman, but we've had this
discussion before (:-). This is from my 6/27 reply to similar responses when I
first posted about this:
<SPAN
class=129330813-26072004>
<SPAN
class=129330813-26072004><SPAN
class=476020112-27062004><FONT
size=2>----------<SPAN
class=476020112-27062004>-----
<SPAN
class=129330813-26072004>
<SPAN
class=476020112-27062004>Thanks for your reply Graham, but as I mentioned,
I've tried that, and it has problems.
<SPAN
class=476020112-27062004>
<SPAN
class=476020112-27062004>Try the more complete setup below, with a couple of
random indicators added. Everything's fine with nothing blanked. Blank out one
bar, and the price plot still looks fine, but MACD and RSI spike to zero on
the null price bars, causing them to rescale, the MACD illegibly. Blank a
few more bars, past a SAR cross, and SAR does the same thing.<SPAN
class=476020112-27062004>
<SPAN
class=476020112-27062004>
<FONT face="Courier New" color=#0000ff
size=2>For another approach, comment out the BlankAll() line, and re-enable
BlankAll2(), on the next line. This shifts everything to the right, "off the
page", and then back. I tried this because that seemed very analgous to those
bars really not existing. Turns out that AB seems to treat them as missing
data (makes sense), and uses the existing last value for the missing bars.
<SPAN
class=476020112-27062004>Is there a way to work around all this? Of course,
blank the indicators too. But that means you have to recode every indicator
on any pane you want to do this with.
<SPAN
class=476020112-27062004>
<SPAN
class=476020112-27062004>I'd much rather just drop in a single function to
adjust the price bars, and have everything just work. But setting things to
null doesn't really do it. Any other ideas on a good blanking
mechanism?
<SPAN
class=476020112-27062004>
<SPAN
class=476020112-27062004>What I'd really like is a built in feature that
handled this automatically, including blanking BuyPrice, ShortPrice etc, and
any new built in variables as they get added.
<SPAN
class=476020112-27062004>
<SPAN
class=476020112-27062004>Clearer?
<SPAN
class=476020112-27062004>
<FONT
color=#0000ff>Dave
Merrill
<SPAN
class=476020112-27062004>
<FONT
face="Courier New">-----<SPAN
class=476020112-27062004>-----<SPAN
class=476020112-27062004>-----
<SPAN
class=476020112-27062004>global gBI, gBarsBlanked;
<SPAN
class=476020112-27062004>gBarsBlanked = Param( "bars", 0, 100, 0, -1);gBI
= BarIndex();
<SPAN
class=476020112-27062004>function IsBlanked() { return gBI >=
(BarCount - gBarsBlanked);}function Blank(array) { x =
IIf(IsBlanked(), Null, array); return x;}function
Blank2(array) { x = Ref(Ref(array, -gBarsBlanked),
gBarsBlanked); return x;}function BlankAll() { O =
Blank(O); H = Blank(H); L = Blank(L); C = Blank(C); Avg =
Blank(Avg); V = Blank(V);}function BlankAll2() { O =
Blank2(O); H = Blank2(H); L = Blank2(L); C = Blank2(C); Avg =
Blank2(Avg); V = Blank2(V);}function OHLCTitle() { return
Interval(2) + " " + Date() + " Open = " +
O + ", High = " + H + ", Low = " +
L + ", Close";}
<SPAN
class=476020112-27062004>BlankAll();//BlankAll2();
<SPAN
class=476020112-27062004>GraphXSpace = 5;Plot(C, OHLCTitle(),
colorDefault, styleCandle);Plot(V, "Volume", colorBlue,
styleHistogram+styleOwnScale, 0, LastValue(Highest(V)) *
2);//Plot(IIf(IsBlanked(), 1, 0), "", colorLightGrey,
styleArea+styleOwnScale+styleNoLabel, 0, .5);
<SPAN
class=476020112-27062004>m = MACD(); r = RSI(); s = SAR();
<SPAN
class=476020112-27062004>Plot(m, "MACD", colorBlue, styleOwnScale);Plot(r,
"RSI", colorRed, styleOwnScale);Plot(s, "SAR", colorYellow,
styleDots+styleNoLine);/*Plot(Blank(m), "MACD", colorBlue,
styleOwnScale);Plot(Blank(r), "RSI", colorRed,
styleOwnScale);Plot(Blank(s), "SAR", colorYellow,
styleDots+styleNoLine);*/
<SPAN
class=476020112-27062004>
<FONT
color=#0000ff>----------<SPAN
class=476020112-27062004>-----
<BLOCKQUOTE dir=ltr
>
This
removes bars under param() control.<SPAN
class=421373612-26072004><FONT face=Arial color=#0000ff
size=2>herman
Z = <FONT
face="Lucida Console">Null;LB =<FONT
color=#0000ff>LastValue(<FONT
color=#0000ff>BarIndex());<FONT
size=2>O = IIf(<FONT
color=#0000ff>BarIndex()>(LB-RM),Z,O);<FONT
size=2>H = IIf(<FONT
color=#0000ff>BarIndex()>(LB-RM),Z,H);<FONT
size=2>L = IIf(<FONT
color=#0000ff>BarIndex()>(LB-RM),Z,L);<FONT
size=2>C = IIf(<FONT
color=#0000ff>BarIndex()>(LB-RM),Z,C);<FONT
face="Lucida Console" color=#008000 size=2>// Just an example
systemStochRsi=EMA((<FONT
color=#0000ff>RSI(8)-<FONT
color=#0000ff>LLV(RSI(<FONT
color=#ff00ff>8),8))/(<FONT
color=#0000ff>HHV(RSI(<FONT
color=#ff00ff>8),8)-<FONT
color=#0000ff>LLV(RSI(<FONT
color=#ff00ff>8),8)),<FONT
color=#ff00ff>3)*100;<FONT
size=2>Buy=Cross(<FONT
color=#ff00ff>17,StochRsi) AND <FONT
color=#0000ff>Ref(MA(C,<FONT
color=#ff00ff>21),-1) < <FONT
color=#0000ff>MA(C,<FONT
color=#ff00ff>21);;Sell<FONT
size=2>=Cross(StochRsi,<FONT
color=#ff00ff>83);Short<FONT
size=2>=Cross(StochRsi,<FONT
color=#ff00ff>83) AND Ref(<FONT
color=#0000ff>MA(C,21),-<FONT
color=#ff00ff>1) > MA(C,<FONT
color=#ff00ff>21);Cover<FONT
size=2>=Cross(<FONT
color=#ff00ff>17,StochRsi);<FONT
size=2>Plot(C,<FONT
color=#ff00ff>"Close",2,<FONT
color=#ff00ff>1);<FONT
size=2>PlotShapes(<FONT
color=#0000ff>IIf(Buy,shapeUpArrow,<FONT
color=#0000ff>IIf(Short,shapeDownArrow,shapeNone)),<FONT
color=#0000ff>IIf<FONT
size=2>(Buy,colorBrightGreen,<FONT
color=#0000ff>IIf(Short,colorRed,colorBlack)));
-----Original Message-----From: Dave
MerrillSent: Monday, July 26, 2004 8:26 AMTo:
amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] Training
mode.
<SPAN
class=606461512-26072004>I've asked for something similar myself, maybe
with a slider or something to control the number of bars blanked at the
end, rather than only stepping through one at a time. Besides training
your mind, it's also useful for evaluating the behavior of indicators that
"guess" about the future, or for other reasons change shape as more data
becomes available.
<SPAN
class=606461512-26072004>
<SPAN
class=606461512-26072004>The closest I know of that you can do currently
is to set all prices after a certain bar to null. Some types of indicators
do odd things right at the transition point, so you may need to null them
out too. For that reason, you may have to recode this arrangement
specifically for every pane, not idea;.
<SPAN
class=606461512-26072004>
<SPAN
class=606461512-26072004>It also won't remove hand-drawn studies, much
less put them back later. You might be able to code up something that sets
the color of studies to your background color, maybe?
<SPAN
class=606461512-26072004>
<SPAN
class=606461512-26072004>It's better than nothing, and AFIK, the best we
can do without it being built into AB, but I too hope Tomasz adds a
feature like this.
<SPAN
class=606461512-26072004>
<SPAN
class=606461512-26072004>Dave Merrill
<BLOCKQUOTE
>I
would like to set AB's data to a selected date back in time, clear
of all existing studies I might have drawn like trendlines ect, but
trendlines and other studies are able to be drawn. Then every time
the space bar is pressed a new days(weeks or tick) worth of data is
added.The reason for this of cause is to test or practice
trading like backtesting your idears and instinks in real
time. Is there currently a way to do
this?Downloading each days history is not a solution. To time
consuming.Any idear?Thanks
Ant.Check
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href="">http://www.amibroker.com/Check
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href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
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