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Without verifying the rest of the formula the plotting problem can be corrected by changing CandlePatternTrue plot statement to:
Plot(IIf(CandlePatternTrue,0.995*L,Null),"",6,2|4);
Some uses of NULL in the plot statements give unpredictable results.
best regards,
herman
Sunday, February 25, 2007, 12:20:55 PM, you wrote:
> Hello,
> This morning I was trying to find a simple Gap up Gap down AFL
> exploration or chart indicator, couldn't find a "simple one", could
> not code it using "Powerscan", so I downloaded a couple of Herman's
> AFL's for candlesticks from the AB Library.
> Well, some of Hermans formula's don't have code for plot, or scan or
> explore, so that was a total waste of time for me. I am sure they are
> great formula's for those who know what to do with them.
> Found this good one by Herman, but it doesn't plot correctly on AB
> 4.89 and parameters doesn't include any adjustment (like "style own
> scale") other than selecting the candlestick formula number (#37 for
> gap up). Using this formula my beautiful candlesticks turned flat
> like a pancake, basically a straight line across the middle of the
> screen with a few vertical blue lines underneath and a couple of
> green and red arrows.
> As Thomasz improves AB for the AFL coders out there, some older
> formulas no longer work or display properly, leaving the traders in
> the dust, and the AFL library littered with broken code.
> Before I go outside and kick a field goal with my laptop in utter
> disgust with my inability to code AFL, then hit the bottle of Crown
> Royal real hard, could someone advise how to fix this code?
> Might cure my headache and prevent a hangover.
> 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;
> }
> P = Param("CandlePattern#",20,0,44,1);
> CandlePatternTrue = CandlePattern(P);
> NextBar = Ref(CandlePatternTrue,-1);
> Profit = IIf(NextBar,(C-O)/O*100,0);
> SecondBar = BarIndex()==2;
> SimpleProfit = LastValue(Cum(Profit));
> CompoundedProfit = (LastValue(AMA2(1,(SecondBar==1),(SecondBar==0)*(1
> + Profit/100)))-1)*100;
> Upday = IIf(NextBar, (C-O)>0,0);
> downDay = IIf(NextBar, (C-O)<0,0);
> PatternColor = IIf(CandlePatternTrue,2,1);
> NumUpDays = LastValue(Cum(UpDay));
> NumDownDays = LastValue(Cum(downDay));
> NumPatterns = LastValue(Cum(CandlePatternTrue ));
> LowestInDisplay = Lowest(ValueWhen(Status("barVisible"),L));
> HighestInDisplay = Highest(ValueWhen(Status("Barvisible"),H));
> Plot(C,"Close",colorBlack,64);
> Plot(IIf(CandlePatternTrue,1,Null)*0.995*L,"",6,2|4);
> PlotShapes(UpDay*shapeUpArrow,colorBrightGreen,0,L);
> PlotShapes(downDay*shapeDownArrow,colorRed,0,H);
> Title = "\nCANDLE PATTERN ANALYSIS\n\n"+
> "Open: "+NumToStr(O,1.2)+"\n"+
> "High: "+NumToStr(H,1.2)+"\n"+
> "Low: "+NumToStr(L,1.2)+"\n"+
> "Close: "+NumToStr(C,1.2)+"\n\n"+
> "Candle Pattern: "+PatternName+"\n"+
> "Candle Pattern# "+NumToStr(P,1.0)+"\n"+
> "#Patterns found: "+NumToStr(NumPatterns ,1.0)+"\n"+
> "#Updays: "+NumToStr(NumUpDays,1.0,False)+
> " ["+NumToStr(Nz(NumUpDays/NumPatterns*100),1.0,False)+"%]\n"+
> "#DownDays: "+NumToStr(NumDownDays,1.0,False)+
> " ["+NumToStr(Nz(NumDownDays/numpatterns*100),1.0,False)+"%]
> \n\n"+
> "Profit at cursor: "+NumToStr(Profit,1.4)+"%\n"+
> "Ave.Profit/Pattern:"+NumToStr(Nz(SimpleProfit/NumPatterns),1.4)+"%
> \n"+
> "Tot.Simple profit: "+NumToStr(SimpleProfit,1.4)+"%\n"+
> "Tot.Comp. profit: "+NumToStr(CompoundedProfit,1.4)+"%\n";
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