Alexstream intraday for Amibroker (AFL)

SetBarsRequired(1000000, 1000000); 
SetChartOptions(2,chartShowArrows|chartShowDates); 
SetTradeDelays(0,0,0,0);  

P = 12;
q = 41;
a = 88;
period= 4;
mult = 1.4;
x = 1250;
ApplyStop( 2, 2, x, 0, False, 0);

showPrice  = ParamToggle("Show Price","No|yes",1); 
showArrows = ParamToggle("Show Arrows","No|yes",1); 
showRibbon = ParamToggle("Show Ribbon","No|yes",1); 
  
f=ATR(period); 
  
VS[0] = Close[0];  
trend[0] = 0; 
HighC[0]=0; 
Lowc[0]=0; 
  
  
for( i = period+1; i < BarCount; i++ )  
{  
  
  vs[i] = vs[i-1]; 
  trend[i]  = trend[i-1]; 
  highC[i]  = HighC[i-1]; 
  lowc[i]   = lowc[i-1]; 
  
    if ((trend[i]>=0) && ( C[i] <VS[i] )) 
    { 
            trend[i] =-1; 
            HighC[i] = C[i]; 
            lowc[i] = C[i]; 
    } 
  
    if ((trend[i]<=0) && (C[i] >VS[i])) 
    { 
            trend[i]=1; 
            HighC[i] = C[i]; 
            lowc[i] = C[i]; 
    }    
  
    if (trend[i]==-1)  
    { 
        if (C[i]<lowc[i]) lowc[i] = C[i]; 
     VS[i]= lowc[i]+ (mult*f[i]); 
    } 
  
  
    if (trend[i]==1)   
    { 
        if (C[i]>HighC[i]) HighC[i] = C[i]; 
     VS[i]= HighC[i]-(mult*f[i]); 
    } 
  
}  
  
  
Buy=Cross(Trend,0) AND StochK(P,3)>q 
AND Ref(StochK(P,3),-1)<=q
 AND Ref(StochK(P,3),-1)<StochK(P,3) 
AND StochK(P,3)>StochD(P,3,3);

Sell= Cross(StochD(P,3,3),StochK(P,3))
AND StochK(P,3)>a;
Short = Cross(0, Trend) AND StochK(P,3)<a AND Ref(StochK(P,3),-1)>=a
 AND Ref(StochK(P,3),-1)>StochK(P,3) 
AND StochK(P,3)<StochD(P,3,3);

Cover = Cross(StochK(P,3),StochD(P,3,3))
AND StochK(P,3)<q;

Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
Short=ExRem(Short,Cover);
Cover=ExRem(Cover,Short);

 
if (ShowPrice) Plot(Close,"Close",colorBlack,styleCandle); 
Plot(VS, "Vol Stop",IIf(trend==1,10,11 ),styleThick); 
  
mkol  = IIf( Trend==1, 10,  11); 
if (ShowRibbon) Plot(5, "ribbon", mkol, styleOwnScale|styleArea|styleNoLabel|styleNoTitle, 0, -5);   
  
shape = Buy * shapeUpArrow + Sell* shapeDownArrow; 
if (ShowArrows) PlotShapes(IIf(Buy,shapeUpArrow,0),5,0,Graph0,-15); PlotShapes(IIf(Sell,shapeDownArrow,0),4,0,Graph0,-15); PlotShapes(IIf(Cover,shapeHollowUpArrow,0),5,0,Graph0,-15); PlotShapes(IIf(Short,shapeHollowDownArrow,0),4,0,Graph0,-15); 
AlertIf( Buy, "SOUND C:\\Windows\\Media\\timeout.wav", "Sell " + C,2,1+2,1); 
AlertIf( Sell, "SOUND C:\\Windows\\Media\\timeout.wav","Buy " + C,1,1+2,1);