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The original works correctly it just contain superfluous code
(extra parameter info), here is the correct forumla. Thanks TJ.
/* Standard Error Bands
*/ Periods
= Param(<FONT
color=#ff00ff>"Standard Error", <FONT
color=#ff00ff>18, <FONT
color=#ff00ff>1, <FONT
color=#ff00ff>100, <FONT
color=#ff00ff>1<FONT
color=#000000>); <FONT
color=#800000>function<FONT
size=2> SteBand( array, periods, upper ) {
Lr = <FONT
color=#0000ff>LinearReg<FONT
size=2>( array, periods ); se = <FONT
color=#0000ff>StdErr<FONT
size=2>( array, periods ); <FONT
color=#800000>return LR + <FONT
color=#0000ff>IIf( upper, <FONT
color=#ff00ff>1, -<FONT
color=#ff00ff>1 ) * <FONT
color=#ff00ff>2<FONT
color=#000000> * se; } upperstderrband = SteBand( <FONT
color=#000000>C, Periods, <FONT
color=#000000>True<FONT
size=2> ); lowerstderrband = SteBand( <FONT
color=#000000>C, Periods, <FONT
color=#000000>False<FONT
size=2> ); midstderrband = (upperstderrband +
lowerstderrband )/2<FONT
face="Courier New">; <FONT
color=#0000ff>Plot( <FONT
color=#000000>Close, <FONT
color=#ff00ff>"Close", <FONT
color=#000000>colorBlack, <FONT
color=#000000>styleCandle<FONT
face="Courier New"> ); <FONT
color=#0000ff>Plot( upperstderrband , <FONT
color=#ff00ff>"upperstderrband ", <FONT
color=#000000>colorGreen, <FONT
color=#ff00ff>4<FONT
color=#000000> ); Plot<FONT
color=#000000>( lowerstderrband , "lowerstderrband
", <FONT
color=#000000>colorRed, <FONT
color=#ff00ff>4<FONT
color=#000000> ); Plot<FONT
color=#000000>( midstderrband , "midstderrband
", <FONT
color=#000000>colorBlack , <FONT
color=#000000>styleLine<FONT
face="Courier New">); <FONT
color=#000000>GraphXSpace = <FONT
color=#ff00ff>3;
Regards,William Peters<A
href="">www.amitools.com
-----Original Message-----From: dcrotty2003 [<A
href=""><FONT
size=2>mailto:dcrotty2003@xxxxxxxxxxxx]Sent:
Saturday December 20, 2003 5:52 PMTo: amibroker@xxxxxxxxxxxxxxxSubject:
[amibroker] Re: Standard Error bands - IndicatorHi
William,Maybe it's just me, but the Param:Periods=
Param("Periods", 3, 1, 100, 1);...doesn't seem to
work.Dave.--- In amibroker@xxxxxxxxxxxxxxx, "William
Peters"<williampeters@xxxx> wrote:> Hi,>> Just
sharing some code that I originally found on this forum(somewhere)
and> was subsequently found to be wrong. Tomasz has made
thecorrections so here> it is. I've also added it to the AFL library
on the AmiBroker web site.>> /* Standard Error Bands */>
Var= Param("Standard Error", 18, 1, 100, 1);> Periods= Param("Periods",
3, 1, 100, 1);>> function SteBand( array, periods, upper )>
{> Lr = LinearReg( array, periods );> se =
StdErr( array, periods );> return LR + IIf( upper, 1, -1 ) *
2 * se;> }>> upperstderrband = SteBand( C, Var, True
);> lowerstderrband = SteBand( C, Var, False );> midstderrband =
(upperstderrband + lowerstderrband )/2;>> Plot(upperstderrband
,"upperstderrband ",colorGreen,4);>
Plot(Close,"Close",colorBlack,styleCandle);> Plot(lowerstderrband
,"lowerstderrband ",colorRed,4);> Plot(midstderrband ,"midstderrband
",colorBlack ,styleLine);> GraphXSpace = 3;> Regards,>
William Peters> www.amitools.comSend BUG REPORTS to
bugs@xxxxxxxxxxxxxSend SUGGESTIONS to
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