Displaying trail compare Pastie For Amibroker (AFL)

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// E.M.Pottasch, Jan 2014
per1=Param("Length ATR",20,1,150,1); // ATR length
fac1=Param("Chandelier Factor",2,1,10,0.1); // chandelier factor
tog1=ParamToggle("Trail value","Close|High&Low",1);
tog2=ParamToggle("Trail method","Chandelier|VSTOP",0);
 
///////////// Chandelier code by E.M.Pottasch, adapted from Chuck Lebeau's code
function vstop_func(trBull,trBear,hl,per)
{
    trailArray=0;
    if(hl)
    {
        hh=H;
        ll=L;
    }
    else
    {
        hh=C;
        ll=C;   
    }
    for(i=per+1;i<BarCount;i++)
    {
        prev=trailArray[i-1];
  
        if (C[i]>=prev AND C[i-1]>=prev)//long continuation
        {
            trailArray[i]=Max(prev,hh[i]-trBull[i]);
        }
        else if (C[i]<=prev AND C[i-1]<=prev)//short continuation
        {
            trailArray[i]=Min(prev,ll[i]+trBear[i]);
        } 
        else if (C[i]>prev AND C[i-1]<=prev)//long trigger 
        {
            trailArray[i]=hh[i]-trBull[i];
        }
        else if (C[i]<prev AND C[i-1]>=prev)//short trigger
        {
            trailArray[i]=ll[i]+trBear[i];  
        }
    }
    return trailArray;
}
///////////// end Chandelier code by E.M.Pottasch, adapted from Chuck Lebeau's code
///////////// Chandelier code by Geoff Mulhall
function aChandelierCl(AtrARRAY, AtrMult) {
// Skip empty values
i = 0;
do {result[i] = Null;
    i++;
    } 
while( i < BarCount AND (IsNull(O[i]) OR IsNull(H[i]) OR IsNull(L[i]) OR
IsNull(C[i]) ) ); 
First = i;
 
if (i < BarCount - 1) {
    HHC[First]    = C[First];
    LLC[First]    = C[First];
 
    if (C[First + 1] > HHC[First]) {
        HHC[First + 1] = C[First + 1];
        LLC[First + 1] = LLC[First];
        result[First] = C[First] - AtrMult * AtrARRAY[First];
        iTrade = "LT";
    }
    else {
        if (C[First + 1] < LLC[First]) {
            HHC[First = 1] = HHC[First];
            LLC[First + 1] = LLC[First + 1];
            result[First] = C[First] + AtrMult * AtrARRAY[First];
            iTrade = "ST";
        }
        else {
            HHC[First + 1] = C[First + 1];
            LLC[First + 1] = C[First + 1];
            result[First] = C[First] - AtrMult * AtrARRAY[First];
            iTrade = "LT";
        }
    }
 
    for( i = First; i < BarCount; i++ ) {
        if (iTrade == "LT") {
            if (C[i] >= result[i-1]) {        // Long Trade is continuing
                if (C[i] > C[i-1]) {
                    HHC[i] = C[i];
                }
                else { 
                    HHC[i] = HHC[i-1];
                }
                result[i] = HHC[i] - AtrMult * AtrARRAY[i];
                if (result[i] < result[i-1]) {
                    result[i] = result[i-1];
                }
            }
            else {                            // Long trade Exit triggered
                iTrade = "ST";
                LLC[i] = C[i];
                result[i] = C[i] + AtrMult * AtrARRAY[i];
            }
        }
        else {                               // Short trade
            if (C[i] <= result[i-1]) {
                if (C[i] <= C[i-1]) {        // Short Trade is continuing
                    LLC[i] = C[i];
                }
                else {
                    LLC[i] = LLC[i-1];
                }
                result[i] = LLC[i] + AtrMult * AtrARRAY[i];
                if (result[i] > result[i-1]) {
                    result[i] = result[i-1];
                }
            }
            else {                           //Short Trade Exit is triggered
                iTrade = "LT";
                HHC[i]  = C[i];
                result[i] = C[i] - AtrMult * AtrARRAY[i];
            }
        }
    }
}
return result;
}
function aChandelierHL(AtrARRAY, AtrMult) {
// Skip empty values
i = 0;
do {result[i] = Null;
    i++;
    } 
while( i < BarCount AND (IsNull(O[i]) OR IsNull(H[i]) OR IsNull(L[i]) OR
IsNull(C[i]) ) ); 
First = i;
 
if (i < BarCount - 1) {
    HHC[First]    = H[First];
    LLC[First]    = L[First];
 
    if (H[First + 1] > HHC[First]) {
        HHC[First + 1] = H[First + 1];
        LLC[First + 1] = LLC[First];
        result[First] = H[First] - AtrMult * AtrARRAY[First];
        iTrade = "LT";
    }
    else {
        if (L[First + 1] < LLC[First]) {
            HHC[First = 1] = HHC[First];
            LLC[First + 1] = LLC[First + 1];
            result[First] = L[First] + AtrMult * AtrARRAY[First];
            iTrade = "ST";
        }
        else {
            HHC[First + 1] = C[First + 1];
            LLC[First + 1] = C[First + 1];
            result[First] = H[First] - AtrMult * AtrARRAY[First];
            iTrade = "LT";
        }
    }
 
    for( i = First; i < BarCount; i++ ) {
        if (iTrade == "LT") {
            if (C[i] >= result[i-1]) {        // Long Trade is continuing
                if (H[i] > H[i-1]) {
                    HHC[i] = H[i];
                }
                else { 
                    HHC[i] = HHC[i-1];
                }
                result[i] = HHC[i] - AtrMult * AtrARRAY[i];
                if (result[i] < result[i-1]) {
                    result[i] = result[i-1];
                }
            }
            else {                            // Long trade Exit triggered
                iTrade = "ST";
                LLC[i] = L[i];
                result[i] = L[i] + AtrMult * AtrARRAY[i];
            }
        }
        else {                               // Short trade
            if (C[i] <= result[i-1]) {
                if (L[i] <= L[i-1]) {        // Short Trade is continuing
                    LLC[i] = L[i];
                }
                else {
                    LLC[i] = LLC[i-1];
                }
                result[i] = LLC[i] + AtrMult * AtrARRAY[i];
                if (result[i] > result[i-1]) {
                    result[i] = result[i-1];
                }
            }
            else {                           //Short Trade Exit is triggered
                iTrade = "LT";
                HHC[i]  = H[i];
                result[i] = H[i] - AtrMult * AtrARRAY[i];
            }
        }
    }
}
return result;
}
///////////// end Chandelier code by Geoff Mulhall
 
if(!tog2)
{
    if(tog1) trailArray=aChandelierHL(ATR(per1),fac1);
    else trailArray=aChandelierCl(ATR(per1),fac1);
}
else
{
    trBull=fac1*ATR(per1);
    trBear=fac1*ATR(per1);
    trailArray=vstop_func(trBull,trBear,tog1,per1);trailarray=IIf(trailarray==0,Null,trailarray);
}
 
GraphXSpace=5;SetChartBkColor(colorBlack);SetChartOptions(0,chartShowDates);
SetBarFillColor(IIf(C>O,ColorRGB(0,75,0),IIf(C<=O,ColorRGB(75,0,0),colorLightGrey)));
Plot(C,"\nPrice",IIf(C>O,ColorRGB(0,255,0),IIf(C<=O,ColorRGB(255,0,0),colorLightGrey)),64);
Plot(IIf(trailArray>C,trailArray,Null),"\ntrailShort",ParamColor("ColorTrailShort",ColorRGB(255,0,0)),styleStaircase);
Plot(IIf(trailArray<C,trailArray,Null),"\ntrailLong",ParamColor("ColorTrailLong",ColorRGB(0,255,0)),styleStaircase);
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