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Re: [amibroker] CumAdvDel Scan Numbers Change



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Perhaps TJ or someone else can answer. In AB help section, this code is called "slightly improved formula" of Advance-decline line.
Dave
 
----- Original Message -----
Sent: Sunday, November 27, 2005 8:43 PM
Subject: Re: [amibroker] CumAdvDel Scan Numbers Change

I am curious about the logic behind this line of code.
 
Difference = (Foreign("~UpBars","X") -Foreign("~DnBars","X")) / (Foreign("~NcBars","X") + 1);
 
Why divide the net change of advance-decline by the NoChange?
----- Original Message -----
Sent: Sunday, November 27, 2005 08:26 PM
Subject: [amibroker] CumAdvDel Scan Numbers Change

Hi Everyone
This is driving me nuts. Why does the cumulative number change for AdvDecl after I've run the scan, plotted it and change tickers. For example, I've run this in AA, Scan( I believe I swiped it from TJ somewhere). Its then plotted. But the numbers for AddDecLine change depending on which ticker is shown on adjacent window. Why should AddDecl change with different tickers if I don't rerun AA scan?
I most be dense. This has gotta be simple!
Thanks
Dave
 
AddToComposite(ROC(C,1)>0,"~UpBars","X");

AddToComposite(ROC(C,1)<0,"~DnBars","X");

AddToComposite(ROC(C,1)==0,"~NcBars","X");

Buy=Sell=Short=Cover=0;

Filter=1;

Difference = (Foreign("~UpBars","X") -Foreign("~DnBars","X")) / (Foreign("~NcBars","X") + 1);

DiffSqrt = IIf(Difference>0,sqrt(Difference), -sqrt(-Difference));

AddDecLine = Cum(DiffSqrt);

Plot(AddDecLine, "Cum AdvanceDecline",colorBlack,styleLine | styleThick);



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