_SECTION_BEGIN("TD Systems");
// Parameters
ShowNumbers= ParamToggle("Show 1-8 Numbers","No|Yes", 1);
ShowTDPoints = ParamToggle("Show TD Points", "No|Yes", 1);
ShowTDST = ParamToggle("Show TD Setup Trend", "No|Yes", 1);
tdstsa = 0;
tdstba = 0;
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//********************************************** TD Points********************************************************************/
function TD_Supply()
{
	return ( H > Ref(H, 1) AND H > Ref(H, -1) AND H > Ref(C, -2));
}
function TD_Demand()
{
	return ( L < Ref(L, 1) AND L < Ref(L, -1) AND L < Ref(C, -2));
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// *********************************************** TD Sequential************************************************************/
// *** Setup Buy Signal ***
//nine consecutive days closes less than the close four days earlier
Con = C < Ref( C, -4);
Buy9Bars = BarsSince(BarsSince(Con));
Buy9Signal = Buy9Bars == 9;

// *** Requirements ***
//The first day of the nine-day  must be preceded by a close day immediately before it that is greater than OR equal to the Close four days earlier
Con = Ref(C, -9) >= Ref(C, -13);
Buy9Req = Buy9Signal AND Con;

// *** Intersection ***
// the high of either day 8 or day 9 is greater than or equal to the low three, four, five, six, OR seven days earlier
Con1 = (H >= Ref(L, -3)) OR ( Ref(H, -1) >= Ref(L, -3));
Con2 = (H >= Ref(L, -4)) OR ( Ref(H, -1) >= Ref(L, -4));
Con3 = (H >= Ref(L, -5)) OR ( Ref(H, -1) >= Ref(L, -5));
Con4 = (H >= Ref(L, -6)) OR ( Ref(H, -1) >= Ref(L, -6));
Con5 = (H >= Ref(L, -7)) OR ( Ref(H, -1) >= Ref(L, -7));

Buy9Intr = Buy9Req AND (Con1 OR Con2 OR Con3 OR Con4 OR Con5);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// *** Setup Sell Signal ***
//nine consecutive days closes greater than the Close four days earlier.
Con = C > Ref( C, -4);
Sell9Bars = BarsSince(BarsSince(Con));
Sell9Signal = Sell9Bars == 9;

// *** Requirements ***
//The first day of the nine-day must be preceded by a Close day immediately before it that is less than the Close four days earlier
Con = Ref(C, -9) < Ref(C, -13);
Sell9Req = Sell9Signal AND Con;

// *** Intersection ***
//the low of either day 8 or day 9 is less than or equal to the high three, four, five, six, OR seven days earlier
Con1 = (L <= Ref(H, -3)) OR ( Ref(L, -1) <= Ref(H, -3));
Con2 = (L <= Ref(H, -4)) OR ( Ref(L, -1) <= Ref(H, -4));
Con3 = (L <= Ref(H, -5)) OR ( Ref(L, -1) <= Ref(H, -5));
Con4 = (L <= Ref(H, -6)) OR ( Ref(L, -1) <= Ref(H, -6));
Con5 = (L <= Ref(H, -7)) OR ( Ref(L, -1) <= Ref(H, -7));

Sell9Intr = Sell9Req AND (Con1 OR Con2 OR Con3 OR Con4 OR Con5);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if(StrToNum(NumToStr(Buy9Intr))) Sell9Intr = False;
if(StrToNum(NumToStr(Sell9Intr))) Buy9Intr = False;
BuySignal = Flip(Buy9Intr, Sell9Intr);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// *** Buy Countdown ***
//With respect to a pending Buy Signal, the close must be less than the low two days earlier; 
Con = C < Ref(L, -2);
Buy13Count = Sum(Con AND BuySignal, BarsSince(Buy9Intr));
Buy13Signal = Buy13Count == 13;

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// *** Sell Countdown ***
//with respect to a pending Sell Signal, the Close must be greater than the High two trading days earlier.
Con = C > Ref(H, -2);
Sell13Count = Sum(Con AND NOT BuySignal, BarsSince(Sell9Intr));
Sell13Signal = Sell13Count == 13;
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//*********************************************** TD Sequential Plotting area *************************************************/
Plot(C, "", IIf(O>=C, colorRed, colorGreen), styleBar);
PlotShapes(IIf(Buy9Intr OR Sell9Intr, shapeDigit9, shapeNone),colorBlue, 0, H,20);
if(ShowNumbers)
PlotShapes(IIf(Buy9Bars==1, shapeDigit1,
 			 IIf(Buy9Bars==2, shapeDigit2,
  			 IIf(Buy9Bars==3, shapeDigit3,
  			 IIf(Buy9Bars==4, shapeDigit4,
  			 IIf(Buy9Bars==5, shapeDigit5,
  			 IIf(Buy9Bars==6, shapeDigit6,
  			 IIf(Buy9Bars==7, shapeDigit7,
  			 IIf(Buy9Bars==8, shapeDigit8,
			 IIf(Buy9Bars >9, shapeStar,shapeNone))))))))),colorGreen, 0, H, H*.001);
if(ShowNumbers)
PlotShapes(
 			IIf(Sell9Bars==1, shapeDigit1,
 			IIf(Sell9Bars==2, shapeDigit2,
  			IIf(Sell9Bars==3, shapeDigit3,
  			IIf(Sell9Bars==4, shapeDigit4,
  			IIf(Sell9Bars==5, shapeDigit5,
  			IIf(Sell9Bars==6, shapeDigit6,
  			IIf(Sell9Bars==7, shapeDigit7,
  			IIf(Sell9Bars==8, shapeDigit8,
			IIf(sell9bars>9, shapeStar,shapeNone))))))))),colorRed, 0, H, H*.001);

Sell = Sell13Signal AND NOT BuySignal;
Buy = Buy13Signal AND BuySignal;
Sell = ExRem(Sell, Buy);
Buy = ExRem(Buy, Sell);
PlotShapes(Sell*shapeDownArrow, colorYellow, 0, H, -H*.001);
PlotShapes(Buy*shapeUpArrow, colorBrightGreen, 0, L, -L*.001);

if(StrToNum(NumToStr(BuySignal)))
bgColor = ColorRGB(0,66, 2);
else
bgColor = ColorRGB(66,2, 0);
SetChartBkGradientFill( colorBlack, bgColor);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//*********************************************** TD Points Plotting area*************************************************/
if(ShowTDPoints)
{
PlotShapes(TD_Supply()*shapeSmallCircle, colorRed, 0, H, H*.001);
PlotShapes(TD_Demand()*shapeSmallCircle, colorGreen, 0, L, -L*.001);
///////////////////////////////////////////////////////////////////////////
y0 = StrToNum(NumToStr(ValueWhen(TD_Demand(), L)));
x = LineArray(0, y0, (BarCount-1), y0);
Plot(x, "", colorGold, styleDashed);
y0 = StrToNum(NumToStr(ValueWhen(TD_Supply(), H)));
x = LineArray(0, y0, (BarCount-1), y0);
Plot(x, "", colorGold, styleDashed);
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//*********************************************** TDST Plotting area*************************************************/
// ---------------->>>> Code from Dave <<<----------------------
//
if(ShowTDST)
{
tdstba =Cum(0);
tdstb = Null;
HHV9 = HHV(H,9);
for (i = 0; i < 10; i++)  tdstba[i] = Null;

for( i = 10; i < BarCount; i++ ) 
{ 
  if (Buy9Bars[i] == 9)
    {
      HHV_b = HHV9[i];
      if (HHV_b > C[i-9])
                  tdstb = HHV_b;
             else tdstb = C[i-9];

      for (j = 0; j < 9; j++ )
          tdstba[i-j] = tdstb;
    }
      else tdstba[i] = tdstb;
}

tdstsa =Cum(0);
tdsts = Null;
LLV9 = LLV(L,9);
for (i = 0; i < 10; i++)  tdstsa[i] = Null;

for( i = 10; i < BarCount; i++ ) 
{ 
  if (Sell9Bars[i] == 9)
    {
      LLV_b = LLV9[i];
      if (LLV_b < C[i-9])
                  tdsts = LLV_b;
             else tdsts = C[i-9];

      for (j = 0; j < 9; j++ )
          tdstsa[i-j] = tdsts;
    }
      else tdstsa[i] = tdsts;
}
Plot(tdstba, "TDSTb", colorBlue,styleStaircase | styleThick|styleDots);
Plot(tdstsa, "TDSTs", colorRed,styleStaircase | styleThick|styleDots);

}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Title =  "{{DATE}} - "+Name()+" ("+ FullName()+ ")  - "+" Open="+O+",
High="+H+", Low="+L+", Close="+C+StrFormat(" (%.2f  %.1f%%)
",IIf(ROC(C,1)==0,0,C-Ref(C,-1)),SelectedValue( ROC( C, 1 )))+
"\n"+EncodeColor(colorBlue) +"TDST Buy = " +WriteVal(tdstba, 5.2) +"
"+EncodeColor(colorRed) +"TDST Sell = " +WriteVal(tdstsa, 5.2)+
"\n"+EncodeColor(colorGold)+WriteIf(BuySignal, "(Buy Signal
Active:"+Buy13Count, "(Sell Signal Active: "+Sell13Count)+")";

_SECTION_END();