Links to Thomas Demark Books on Google Books

The New Science of Technical Analysis - Thomas Demark

New Market Timing Techniques - Thomas Demark

Demark on Day Trading Options - Thomas Demark

Amibroker TDST Code

Thomas Demark's Setup Trend, or TDST, code in Amibroker. This code is a slightly modified code found in the AFL library. In my estimation, the changes I've made are for the better:

("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 *************************************************/

Sell = Sell13Signal AND NOT BuySignal;
Buy = Buy13Signal AND BuySignal;
Sell = ExRem(Sell, Buy);
Buy = ExRem(Buy, Sell);

if(StrToNum(NumToStr(BuySignal)))
bgColor = ColorRGB(0,66, 2);
else
bgColor = ColorRGB(66,2, 0);
SetChartBkColor( ColorRGB( 250, 250, 255 ) );
////////////////////////////////////////////////////////////////////////////////\
/////////////////////////////////////////////////
/////////////////////////////////////////////////
//*********************************************** TDST Plotting area*************************************************/

// ---------------->>>> Code from Dave <<<----------------------
//
if(ShowTDST)
{
tdstba =Cum(0);
tdstb = Null;
//i just changed this from high to close//

//note- you were using high and low for months. first, that is not tdst. actual Bloomberg
//tdst uses close for both. second, this shit works way better.

//use close
//use close
//use close!
HHV9 = HHV(C,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;
//i just changed this from low to close//
LLV9 = LLV(C,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;
}
blah=(tdstsa+tdstba)/2;
blah2=MA(blah,34);


Plot(tdstba, "TDSTb", colorBlue,styleLine | styleLine|styleLine);
Plot(tdstsa, "TDSTs", colorRed,styleLine | styleLine|styleLine);


}
////////////////////////////////////////////////////////////////////////////////\
/////////////////////////////////////////////////
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)+")";


("Price");
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) Vol " +WriteVal( V, 1.0 ) +" {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )) ));
Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() );
if( ParamToggle("Tooltip shows", "All Values|Only Prices" ) )
{
ToolTip=StrFormat("Open: %g\nHigh: %g\nLow: %g\nClose: %g (%.1f%%)\nVolume: "+NumToStr( V, 1 ), O, H, L, C, SelectedValue( ROC( C, 1 )));
}
_SECTION_END();

_SECTION_BEGIN("Volume");



/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
THIS SECTION DRAWS TD TREND LINES */

percent = 0.01 * 1; /* Adjust this percent as necessary, I use .01 because FOREX is a 0.0000 number */
firstpointL = 2;
firstpointH = 2;

y0=LastValue(Trough(L,percent,firstpointL));
y1=LastValue(Trough(Ref(L,-1),percent,1));

for( i = 1; i < BarCount AND y0 >= y1; i++ )
{

firstpointL++;
y0=LastValue(Trough(L,percent,firstpointL));
}

x0=BarCount - 1 - LastValue(TroughBars(L,percent,firstpointL));
x1=BarCount - 1 - LastValue(TroughBars(Ref(L,-1),percent,1));
LineL = LineArray( x0, y0, x1, y1, 1 );
/*
Plot(C, "C", colorBlack, styleCandle);
*/



yt0=LastValue(Peak(H,percent,firstpointH));
yt1=LastValue(Peak(Ref(H,-1),percent,1));

for(i = 1; i < BarCount AND yt0 <= yt1; i++ )
{

firstpointH++;
yt0=LastValue(Peak(H,percent,firstpointH));
}
xt0=BarCount - 1 - LastValue(PeakBars(H,percent,firstpointH));
xt1=BarCount - 1 - LastValue(PeakBars(Ref(H,-1),percent,1));
LineH = LineArray( xt0, yt0, xt1, yt1, 1 );



/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

Test