Displaying Support resistance lines Triger Pastie For Amibroker (AFL)

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_SECTION_BEGIN("SUPPORT/RESISTANCE LINES
");
/* CATEGORY 3 SUPPORT BREAKOUT TRIGGER FOR SHORTS: */
 
/* PARAMETERS */
 
ColLSC = ParamColor("SU Color",colorOrange);
ColLRC = ParamColor("RE Color",colorBlue);
 
LL_3_6 = Ref(L,-6) > Ref(L,-3);
LL_3_5 = Ref(L,-5) > Ref(L,-3);
LL_3_4 = Ref(L,-4) > Ref(L,-3);
LL_3_2 = Ref(L,-2) > Ref(L,-3);
LL_3_1 = Ref(L,-1) > Ref(L,-3);
LL_3_0 = L > Ref(L,-3);
Cat3Sup = LL_3_6 AND LL_3_5 AND LL_3_4 AND LL_3_2 AND LL_3_1 AND
LL_3_0;
 
/* SUPPORT LINE ("SC") */
y0=ValueWhen(Cat3Sup,Ref(L,-3),2);
y1=ValueWhen(Cat3Sup,Ref(L,-3),1);
x0=ValueWhen(Cat3Sup,BarIndex(),2)-3;
x1=ValueWhen(Cat3Sup,BarIndex(),1)-3;
 
// looking into the future here, but it is
// only applied to historical plots to determine
// the length of the extension.
xsf=ValueWhen(Cat3Sup,BarIndex(),0)-3;
 
/* CATEGORY 3 RESISTANCE BREAKOUT TRIGGER FOR LONGS: */
HH_3_6 = Ref(H,-6) < Ref(H,-3);
HH_3_5 = Ref(H,-5) < Ref(H,-3);
HH_3_4 = Ref(H,-4) < Ref(H,-3);
HH_3_2 = Ref(H,-2) < Ref(H,-3);
HH_3_1 = Ref(H,-1) < Ref(H,-3);
HH_3_0 = H < Ref(H,-3);
Cat3Res = HH_3_6 AND HH_3_5 AND HH_3_4 AND HH_3_2 AND HH_3_1 AND
HH_3_0;
 
y2=ValueWhen(Cat3Res,Ref(H,-3),2);
y3=ValueWhen(Cat3Res,Ref(H,-3),1);
x2=ValueWhen(Cat3Res,BarIndex(),2)-3;
x3=ValueWhen(Cat3Res,BarIndex(),1)-3;
 
// another look into the future.
xrf=ValueWhen(Cat3Res,BarIndex(),0)-3;
 
Plot(C,"C", colorBlack, styleCandle);
 
extendedSup=0;
extendedRes=0;
 
NullY0=IsNull(y0);
NullY2=IsNull(y2);
 
for ( i = BarCount -1 ; i > 7 ; i-- ) {
if ( !NullY0[i] ){ // only plot lines when enough datapoints avail.
if ( x0[i] != x0[i-1] ) {
 
ms = (y1[i] - y0[i])/(x1[i] - x0[i]); // simple slope of support
 
if ( NOT extendedSup ) { // Haven't extended one yet
 
extendedSup = 1;
Line1 = LineArray( x0[i], y0[i], x1[i] + 3, y1[i] + (3 *
ms),0,True);
Plot(Line1,"",ColLSC,styleLine);
 
Line2 = LineArray( x1[i] + 3, y1[i] + (3 * ms), x1[i] + 4,y1
[i] + (4 * ms), 1,True);
Plot(Line2,"Cat3Sup",colorWhite,styleLine+styleNoRescale);
 
Sell=Cross(Line2,C);
PlotShapes(IIf
(Sell,shapeHollowDownArrow,shapeNone),colorRed,0,H,-10);
 
} else { // old Cat3Sup lines, use 'look ahead' extensions
 
Line3 = LineArray( x0[i], y0[i], x1[i] + 3, y1[i] + (3 *
ms),0,True);
Plot(Line3,"",colorPink,styleLine);
 
Line4 = LineArray( x1[i] + 3, y1[i] + (3 * ms),
xsf[i] + 3, y1[i] + ms * (xsf[i] -
x1[i] + 3), 0,True);
Plot(Line4,"Cat3Sup",colorWhite,styleLine+styleNoRescale);
 
Sell=Cross(Line4,C);
PlotShapes(IIf
(Sell,shapeHollowDownArrow,shapeNone),colorRed,0,H,-10);
}
}
}
 
if ( !NullY2[i] ){ // only plot lines when enough datapoints avail.
if ( x2[i] != x2[i-1] ) {
 
mr = (y3[i] - y2[i])/(x3[i] - x2[i]); // simple slope ofresistance
 
if ( NOT extendedRes ) { // Haven't extended one yet
 
extendedRes = 1;
Line5= LineArray( x2[i], y2[i], x3[i] + 3, y3[i] + (3 *
mr),0,True);
Plot(Line5,"",ColLRC,styleLine);
 
Line6 = LineArray( x3[i] + 3, y3[i] + (3 * mr), x3[i] + 4,y3
[i] + (4 * mr), 1,True);
Plot(Line6,"Cat3Sup",colorWhite,styleLine+styleNoRescale);
 
Buy=Cross(C,Line6);
PlotShapes(IIf
(Buy,shapeUpArrow,shapeNone),colorBrightGreen,0,L,-10);
 
} else { // old Cat3Sup lines, use 'look ahead' extensions
 
Line7= LineArray( x2[i], y2[i], x3[i] + 3, y3[i] + (3 *
mr),0,True);
Plot(Line7,"",colorBlue,styleLine);
 
Line8 = LineArray( x3[i] + 3, y3[i] + (3 * mr),
xrf[i] + 3, y3[i] + mr * (xrf[i] -
x3[i] + 3), 0,True);
Plot(Line8,"Cat3Sup",colorWhite,styleLine+styleNoRescale);
 
Buy=Cross(C,Line8);
PlotShapes(IIf
(Buy,shapeUpArrow,shapeNone),colorBrightGreen,0,L,-10);
}
}
}
}
 
NumColumns = 0;
 
// EXPLORATION EXAMPLE:
Filter = Buy OR Sell;
AddTextColumn(FullName(),"Full name",77,colorPlum, IIf(Close <1.00,colorYellow,colorDefault ) );
result = WriteIf(Buy,"Buy","Sell");
AddTextColumn(result,"Trade", formatChar, IIf
(Buy,colorDarkGreen,colorRed ),
IIf(Sell,colorPink,colorLime));
AddColumn(Ref(Close,-1),"Y-Close",1.4, IIf( ROC(Ref(C,-1),1)>=
0,colorDarkGreen, colorRed ),50 );
AddColumn(Open,"Open",1.4,IIf( ROC(Open, 1 ) >= 0, colorDarkGreen,
colorRed ) );
AddColumn(High,"High",1.4,IIf( ROC(High, 1 ) >= 0, colorDarkGreen,
colorRed ) );
AddColumn(Low,"Low",1.4,IIf( ROC(Low, 1 ) >= 0, colorDarkGreen,
colorRed ) );
AddColumn( Close, "Close", 1.4, IIf( ROC(C, 1 ) >= 0, colorDarkGreen,
colorRed ),50 );
AddColumn( ROC( Close, 1 ), "ROC(1)", 1.2, IIf( ROC(C, 1 ) >= 0,
colorDarkGreen, colorRed));
AddColumn( Volume, "Volume", 10.0, IIf( ROC(V, 1 ) >= 0,
colorDarkGreen, colorRed ) );
AddColumn( y3, "TL Break", 10.4, colorDarkBlue,37 );
AddColumn( ((Close-y3)/y3)*100, "TL Break %", 10.2,
colorDarkBlue,37 );
AddColumn( y1, "TL Break", 10.4, colorRed,40 );
AddColumn( ((Close-y1)/Close)*100, "TL Break %", 10.2, colorRed,40 );
 
_SECTION_END();

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Support resistance lines Triger for Amibroker (AFL)