Amibroker AFL for Identifying Candlestick chart patterns

Candlestick pattern Identification

Candlestick patterns invented by the early Japanese rice traders are becoming more and more popular among technical analysts. The art of identifying a chart pattern is something every share trader must learn. Candlestick chart reading can be like Greek for beginners because of the peculiar terms involved in interpreting the patterns. But with little involvement, the interpretation of candlestick charts can be very interesting. 

I am posting another AFL today. This AFL will identify the candlestick patterns in a chart and print it on the screen. This afl covers all major candlestick patterns. Each pattern has been allocated a number for easy identification. I have listed the allocated number to each pattern below. Wherever the mouse is clicked and a pattern is selected the name of the pattern is displayed at the top left corner of the chart window.

NearDoji  -1, BlackCandle – 2LongBlackCandle -3SmallBlackCandle  -4/ WhiteCandle  -5, LongWhiteCandle - 6 SmallWhiteCandle - 7 BlackMaubozu – 8 WhiteMaubozu – 9, BlackClosingMarubozu - 10, WhiteClosingMarubozu - 11, BlackOpeningMarubozu - 12, WhiteOpeningMarubozu  - 13, HangingMan - 14, Hammer - 15, InvertedHammer - 16, ShootingStar – 17, BlackSpinningTop -18, WhiteSpinningTop - 19, BearishAbandonedBaby - 20, DarkCloudCover - 21, BearishEngulfing - 22, ThreeOutsideDownPattern – 23, BullishAbandonedBaby - 24,BullishMorningDojiStar - 25BullishEngulfing - 26, ThreeOutsideUpPattern - 27BullishHarami – 28ThreeInsideUpPattern - 29/PiercingLine - 30, BearishHarami - 31, ThreeInsideDownPattern - 32,ThreeWhiteSoldiers -33, DarkCloudCover - 34,  ThreeBlackCrows  -35, doji - 36, GapUp - 37, GapDown - 38, BigGapUp - 39, BigGapDown - 40, HugeGapUp - 41HugeGapDown - 42, DoubleGapUp - 43, DoubleGapDown - 44 

I hope this afl will be of some help to beginners who would like to learn the technical aspects of a candlestick pattern chart.


///////////////////////////////////////code is posted below this line////////////////////////////////////////////

SetChartOptions(0,chartShowArrows|chartShowDates);
SetChartBkColor( ParamColor("Color Axes", colorDarkGrey) );
SetChartBkGradientFill( ParamColor("BgTop", colorDarkGrey),ParamColor("BgBottom", colorGrey50)); Periods = Param("Periods", 20, 2, 200, 1, 10 );

_SECTION_BEGIN("Candle Identification");
Plot(C,"",1,64);
O1 = Ref(O,-1);O2 = Ref(O,-2);
H1 = Ref(H,-1);H2 = Ref(H,-2);
L1 = Ref(L,-1);L2 = Ref(L,-2);
C1 = Ref(C,-1);C2 = Ref(C,-2);
function CandlePattern(P)
{
global PatternName;
if(P == 0) { PatternName = "NearDoji"; Pv = (abs(O-C)<= ((H-L)*0.1)); }
else if(P == 1) { PatternName = "BlackCandle"; Pv = (O>C); }
else if(P == 2) { PatternName = "LongBlackCandle"; Pv = (O>C AND
(O-C)/(.001+H-L)>.6); }
else if(P == 3) { PatternName = "SmallBlackCandle"; Pv = ((O>C) AND
((H-L)>(3*(O-C)))); }
else if(P == 4) { PatternName = "WhiteCandle"; Pv = (C>O); }
else if(P == 5) { PatternName = "LongWhiteCandle"; Pv = ((C>O) AND
((C-O)/(.001+H-L)>.6)); }
else if(P == 6) { PatternName = "SmallWhiteCandle"; Pv = ((C>O) AND
((H-L)>(3*(C-O)))); }
else if(P == 7) { PatternName = "BlackMaubozu"; Pv = (O>C AND H==O AND
C==L); }
else if(P == 8) { PatternName = "WhiteMaubozu"; Pv = (C>O AND H==C AND
O==L); }
else if(P == 9) { PatternName = "BlackClosingMarubozu"; Pv = (O>C AND
C==L); }
else if(P == 10) { PatternName = "WhiteClosingMarubozu"; Pv = (C>O AND
C==H); }
else if(P == 11) { PatternName = "BlackOpeningMarubozu"; Pv = (O>C AND
O==H); }
else if(P == 12) { PatternName = "WhiteOpeningMarubozu"; Pv = (C>O AND
O==L); }
else if(P == 13) { PatternName = "HangingMan"; Pv = (((H-L)>4*(O-C)) AND
((C-L)/(.001+H-L)>= 0.75) AND ((O-L)/(.001+H-L)>= 0.75)); }
else if(P == 14) { PatternName = "Hammer"; Pv = (((H-L)>3*(O-C)) AND
((C-L)/(.001+H-L)>0.6) AND ((O-L)/(.001+H-L)>0.6)); }
else if(P == 15) { PatternName = "InvertedHammer"; Pv = (((H-L)>3*(O-C))
AND ((H-C)/(.001+H-L)>0.6) AND ((H-O)/(.001+H-L)>0.6)); }
else if(P == 16) { PatternName = "ShootingStar"; Pv = (((H-L)>4*(O-C))
AND ((H-C)/(.001+H-L)>= 0.75) AND ((H-O)/(.001+H-L)>= 0.75)); }
else if(P == 17) { PatternName = "BlackSpinningTop"; Pv = ((O>C) AND
((H-L)>(3*(O-C))) AND (((H-O)/(.001+H-L))<.4) AND
(((C-L)/(.001+H-L))<.4)); }
else if(P == 18) { PatternName = "WhiteSpinningTop"; Pv = ((C>O) AND
((H-L)>(3*(C-O))) AND (((H-C)/(.001+H-L))<.4) AND
(((O-L)/(.001+H-L))<.4)); }
else if(P == 19) { PatternName = "BearishAbandonedBaby"; Pv = ((C1 == O1)
AND (C2>O2) AND (O>C) AND (L1>H2) AND (L1>H)); }
else if(P == 20) { PatternName = "BearishEveningDojiStar"; Pv = ((C2>O2)
AND ((C2-O2)/(.001+H2-L2)>.6) AND (C2<O1) AND (C1>O1) AND
((H1-L1)>(3*(C1-O1))) AND (O>C) AND (O<O1)); }
else if(P == 21) { PatternName = "DarkCloudCover"; Pv = (C1>O1 AND
((C1+O1)/2)>C AND O>C AND O>C1 AND C>O1 AND (O-C)/(.001+(H-L)>0.6)); }
else if(P == 22) { PatternName = "BearishEngulfing"; Pv = ((C1>O1) AND
(O>C) AND (O>= C1) AND (O1>= C) AND ((O-C)>(C1-O1))); }
else if(P == 23) { PatternName = "ThreeOutsideDownPattern"; Pv = ((C2>O2)
AND (O1>C1) AND (O1>= C2) AND (O2>= C1) AND ((O1-C1)>(C2-O2)) AND (O>C) AND
(C<C1)); }
else if(P == 24) { PatternName = "BullishAbandonedBaby"; Pv = ((C1 == O1)
AND (O2>C2) AND (C>O) AND (L2>H1) AND (L>H1)); }
else if(P == 25) { PatternName = "BullishMorningDojiStar"; Pv = ((O2>C2)
AND ((O2-C2)/(.001+H2-L2)>.6) AND (C2>O1) AND (O1>C1) AND
((H1-L1)>(3*(C1-O1))) AND (C>O) AND (O>O1)); }
else if(P == 26) { PatternName = "BullishEngulfing"; Pv = ((O1>C1) AND
(C>O) AND (C>= O1) AND (C1>= O) AND ((C-O)>(O1-C1))); }
else if(P == 27) { PatternName = "ThreeOutsideUpPattern"; Pv = ((O2>C2)
AND (C1>O1) AND (C1>= O2) AND (C2>= O1) AND ((C1-O1)>(O2-C2)) AND (C>O) AND
(C>C1)); }
else if(P == 28) { PatternName = "BullishHarami"; Pv = ((O1>C1) AND (C>O)
AND (C<= O1) AND (C1<= O) AND ((C-O)<(O1-C1))); }
else if(P == 29) { PatternName = "ThreeInsideUpPattern"; Pv = ((O2>C2)
AND (C1>O1) AND (C1<= O2) AND (C2<= O1) AND ((C1-O1)<(O2-C2)) AND (C>O) AND
(C>C1) AND (O>O1)); }
else if(P == 30) { PatternName = "PiercingLine"; Pv = ((C1<O1) AND
(((O1+C1)/2)<C) AND (O<C) AND (O<C1) AND (C<O1) AND
((C-O)/(.001+(H-L))>0.6)); }
else if(P == 31) { PatternName = "BearishHarami"; Pv = ((C1>O1) AND (O>C)
AND (O<= C1) AND (O1<= C) AND ((O-C)<(C1-O1))); }
else if(P == 32) { PatternName = "ThreeInsideDownPattern"; Pv = ((C2>O2)
AND (O1>C1) AND (O1<= C2) AND (O2<= C1) AND ((O1-C1)<(C2-O2)) AND (O>C) AND
(C<C1) AND (O<O1)); }
else if(P == 33) { PatternName = "ThreeWhiteSoldiers"; Pv = (C>O*1.01)
AND (C1>O1*1.01) AND (C2>O2*1.01) AND (C>C1) AND (C1>C2) AND (O<C1) AND
(O>O1) AND (O1<C2) AND (O1>O2) AND (((H-C)/(H-L))<.2) AND
(((H1-C1)/(H1-L1))<.2) AND (((H2-C2)/(H2-L2))<.2); }
else if(P == 34) { PatternName = "DarkCloudCover"; Pv = (C1>O1*1.01) AND
(O>C) AND (O>H1) AND (C>O1) AND (((C1+O1)/2)>C) AND (C>O1) AND
(MA(C,13)-Ref(MA(C,13),-4)>0); }
else if(P == 35) { PatternName = "ThreeBlackCrows"; Pv = (O>C*1.01) AND
(O1>C1*1.01) AND (O2>C2*1.01) AND (C<C1) AND (C1<C2) AND (O>C1) AND (O<O1)
AND (O1>C2) AND (O1<O2) AND (((C-L)/(H-L))<.2) AND (((C1-L1)/(H1-L1))<.2)
AND (((C2-L2)/(H2-L2))<.2); }
else if(P == 36) { PatternName = "doji"; Pv = (O == C); }
else if(P == 37) { PatternName = "GapUp"; Pv = GapUp(); }
else if(P == 38) { PatternName = "GapDown"; Pv = GapDown(); }
else if(P == 39) { PatternName = "BigGapUp"; Pv = L>1.01*H1; }
else if(P == 40) { PatternName = "BigGapDown"; Pv = H<0.99*L1; }
else if(P == 41) { PatternName = "HugeGapUp"; Pv = L>1.02*H1; }
else if(P == 42) { PatternName = "HugeGapDown"; Pv = H<0.98*L1; }
else if(P == 43) { PatternName = "DoubleGapUp"; Pv = GapUp() AND
Ref(GapUp(),-1); }
else if(P == 44) { PatternName = "DoubleGapDown"; Pv = GapDown() AND
Ref(GapDown(),-1); }
return Pv;
}
PatternNameList = "";
for(Cp=0; Cp<=44; Cp++)
{
VarSet("Pattern"+NumToStr(Cp,1.0),CandlePattern(cP ));
PatternNameList = PatternNameList +PatternName+",";
}
BI = BarIndex();
SelectedBar = SelectedValue(BI) -BI[0];
//Selectedbar = Status("lastvisiblebar")-1;
PStr= "";
for(Cp=0; Cp<=44; Cp++)
{
Temp = VarGet("Pattern"+NumToStr(Cp,1.0));
if(temp[SelectedBar]) Pstr=Pstr+"#"+NumToStr(Cp,1.0)+" - "+StrExtract(PatternNameList,Cp)+"\n";
}
Title = "\nCandle Identifier \n"+ Pstr;
_SECTION_END();

///////////////////////////////////////////////////////end of code /////////////////////////

Best of luck