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<SPAN
class=595243904-27072004>And I *know* I said, at that time, and quoted again
below, that zeroing every indicator yourself requires recoding every indicator
on every pane you want to do this with.
<SPAN
class=595243904-27072004>
<SPAN
class=595243904-27072004>Can it be done? Of course, especially if there's one
particular indicator set you're interested in exploring this way.
<SPAN
class=595243904-27072004>
<SPAN
class=595243904-27072004>Would a simple built-in
blanking-of-N-bars-at-the-end-of-the-data feature be better? I think so, and
thought so when I brought it up a while ago. That's all I was trying to
say.
<SPAN
class=595243904-27072004>
<SPAN
class=595243904-27072004>Dave
<BLOCKQUOTE dir=ltr
>
<SPAN
>I thought I also answered that you
just have to make the indicators Null as well
<SPAN
>
<SPAN
>StochRsi=
IIf(<SPAN
>BarIndex()>(LB-RM),Z, <FONT
color=blue>EMA((<SPAN
>RSI(<SPAN
>8)-<SPAN
>LLV(<SPAN
>RSI(<SPAN
>8),<SPAN
>8))/(<SPAN
>HHV(<SPAN
>RSI(<SPAN
>8),<SPAN
>8)-<SPAN
>LLV(<SPAN
>RSI(<SPAN
>8),<SPAN
>8)),<SPAN
>3)*<SPAN
>100 );
<SPAN
>Cheers,Graham<A
href="">http://e-wire.net.au/~eb_kavan/
<SPAN
>-----Original
Message-----From: Dave
Merrill Sent: Monday, July
26, 2004 9:12 PMTo:
amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: RE: [amibroker] Training
mode.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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:
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>---------------
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>Thanks for
your reply Graham, but as I mentioned, I've tried that, and it has
problems.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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?
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>Clearer?
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>Dave
Merrill
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>---------------
<FONT face="Courier New"
color=blue size=2><SPAN
>global gBI,
gBarsBlanked;
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>gBarsBlanked
= Param( "bars", 0, 100, 0, -1);gBI = BarIndex();
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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";}
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>BlankAll();//BlankAll2();
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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);
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>m = MACD(); r
= RSI(); s = SAR();
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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);*/
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>---------------
<BLOCKQUOTE
>
<SPAN
>This removes bars
under param() control.herman
<SPAN
>Z = <FONT
face="Lucida Console"><SPAN
>Null<FONT
face="Lucida Console"><SPAN
>;LB =<FONT
color=blue>LastValue(<FONT
color=blue>BarIndex());<SPAN
>O = <SPAN
>IIf(<SPAN
>BarIndex()>(LB-RM),Z,<SPAN
>O);<SPAN
>H = <SPAN
>IIf(<SPAN
>BarIndex()>(LB-RM),Z,<SPAN
>H);<SPAN
>L = <SPAN
>IIf(<SPAN
>BarIndex()>(LB-RM),Z,<SPAN
>L);<SPAN
>C = <SPAN
>IIf(<SPAN
>BarIndex()>(LB-RM),Z,<SPAN
>C);<FONT face="Lucida Console"
color=green>//
Just an example systemStochRsi=<SPAN
>EMA((<SPAN
>RSI(<SPAN
>8)-<SPAN
>LLV(<SPAN
>RSI(<SPAN
>8),<SPAN
>8))/(<SPAN
>HHV(<SPAN
>RSI(<SPAN
>8),<SPAN
>8)-<SPAN
>LLV(<SPAN
>RSI(<SPAN
>8),<SPAN
>8)),<SPAN
>3)*<SPAN
>100;<SPAN
>Buy=<SPAN
>Cross(<SPAN
>17,StochRsi) <SPAN
>AND <SPAN
>Ref(<SPAN
>MA(<SPAN
>C,<SPAN
>21),-<SPAN
>1) < <SPAN
>MA(<SPAN
>C,<SPAN
>21);;<SPAN
>Sell=<SPAN
>Cross(StochRsi,<SPAN
>83);<SPAN
>Short=<SPAN
>Cross(StochRsi,<SPAN
>83) <SPAN
>AND <SPAN
>Ref(<SPAN
>MA(<SPAN
>C,<SPAN
>21),-<SPAN
>1) > <SPAN
>MA(<SPAN
>C,<SPAN
>21);<SPAN
>Cover=<SPAN
>Cross(<SPAN
>17,StochRsi);<SPAN
>Plot(<SPAN
>C,<SPAN
>"Close",<SPAN
>2,<SPAN
>1);<SPAN
>PlotShapes(<SPAN
>IIf(<SPAN
>Buy,<SPAN
>shapeUpArrow,<SPAN
>IIf(<SPAN
>Short,<SPAN
>shapeDownArrow,<SPAN
>shapeNone)),<SPAN
>IIf(<SPAN
>Buy,<SPAN
>colorBrightGreen,<SPAN
>IIf(<SPAN
>Short,<SPAN
>colorRed,<SPAN
>colorBlack)));
<FONT
face=Tahoma size=2><SPAN
>-----Original
Message-----From: Dave
MerrillSent: Monday, July
26, 2004 8:26 AMTo:
amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: RE: [amibroker] Training
mode.
<FONT face="Courier New"
color=blue size=2><SPAN
>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.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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;.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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?
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>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.
<FONT face="Times New Roman"
size=2>
<FONT face="Courier New"
color=blue size=2><SPAN
>Dave
Merrill
<BLOCKQUOTE
>
<FONT
face="Courier New" size=2>I would like to
set AB's data to a selected date back in time, <FONT
face="Courier New"><SPAN
><FONT
face="Courier New">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) <FONT
face="Courier New">worth of data is added.<FONT
face="Courier New">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?<FONT
face="Courier New">Downloading each days history is not a solution. To
time consuming.Any
idear?Thanks
<FONT
face="Courier New">Ant.
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