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Re: [amibroker] AFL help: Sell = Ref(exremspan (buy,10),-10);



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same question here.
answer here.
http://finance.groups.yahoo.com/group/amibroker/message/14378
kris45mar <kris45mar@xxxxxxxxx> wrote:
Hello all:

I stumbled across this code in the .chm files and this
looks quite helpful. (message 32098)

Sell=Ref( ExRemSpan( Buy, 10 ) ,-10);

Could someone explain in English what this is doing?

I am trying to code for an exit 10 bars after the
first buy signal (even when there are subsequent buy
signals) and this seems to be doing what I want. Now I
just need to try and understand what it means.

See also thread at
http://www.reefcap.com/ubb/Forum49/HTML/000076.html

************

Buysig = Cross(C , EMA(C,30));
Sellsig = BarsSince(Buysig) == 10;
//Buysig = ExRemSpan(Buysig,10);
//Buysig = ExRem(Buysig, Sellsig); // line #3.
intrade = Flip(Buysig, Sellsig);
Buy = Buysig AND Ref(intrade, -1) == 0;
Sell = Sellsig AND Ref(intrade,-1) ;
Sell=Ref( ExRemSpan( Buy, 10 ) ,-10);

Plot(C,"",1,64);
Plot(EMA(C,30),"",colorBlue,1);
PlotShapes(shapeUpArrow * Buysig, colorLightBlue, 0 ,
L , -10);
PlotShapes(shapeUpArrow * Buy, colorBlue, 0, L, -20);
PlotShapes(shapeDownArrow * Sellsig, colorPink, 0, H,
-20);

PlotShapes(shapeDownArrow * Sell, colorRed, 0, H,
-10);
Plot(intrade,"intrade", IIf(1,colorGreen, colorPink),
styleHistogram | styleOwnScale);

***************



Any help appreciated

Regards

ChrisB



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