The following is the AFL - Candle pattern identifier I got from the net. Once you get the name of the pattern, you can get at the description/explanation from sites like
http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:introduction_to_cand
//Candle Pattern identifier
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 Demostration \n"+ Pstr;
_SECTION_END();