[amibroker] Standard Error bands - Indicator

["William Peters" <williampeters@xxxxxxxxxxxx>]

Hi,
 
Just sharing some code that I 
originally found on this forum (somewhere) and was subsequently found to be 
wrong. Tomasz has made the corrections so here it is. I've also 
added it to the AFL library on the AmiBroker web site.
 
<FONT 
color=#008000>/* Standard Error Bands */<FONT 
face="Courier New"> Var= <FONT 
color=#0000ff>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>); Periods= Param<FONT 
color=#000000>("Periods", 
3, <FONT 
color=#ff00ff>1, <FONT 
color=#ff00ff>100, <FONT 
color=#ff00ff>1<FONT 
color=#000000>); <FONT color=#800000 
size=2>function<FONT 
color=#000000> SteBand( array, periods, upper ) {   Lr = 
LinearReg<FONT 
face="Courier New">( array, periods ); 
  se = StdErr<FONT 
face="Courier New">( array, periods ); 
  return<FONT 
color=#000000> LR + IIf( 
upper, 1, -<FONT 
color=#ff00ff>1 ) * <FONT 
color=#ff00ff>2<FONT 
color=#000000> * se; } upperstderrband = SteBand( <FONT 
color=#000000>C, Var, <FONT 
color=#000000>True<FONT 
size=2> ); lowerstderrband = SteBand( <FONT 
color=#000000>C, Var, <FONT 
color=#000000>False<FONT 
size=2> ); midstderrband = (upperstderrband + 
lowerstderrband )/2<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>(Close<FONT 
color=#000000>,"Close"<FONT 
color=#000000>,colorBlack<FONT 
color=#000000>,<FONT 
color=#000000>styleCandle<FONT 
face="Courier New">); <FONT 
color=#0000ff>Plot(lowerstderrband ,<FONT 
color=#ff00ff>"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
 


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