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This library provides the necessary implementations to screen the following basic patterns: Long White Candle Long Black Candle White Candle Black Candle Short White Candle Short Black Candle White Marubozu Black Marubozu Closing White Marubozu Opening White Marubozu Closing Black Marubozu Opening Black Marubozu White Spinning Top Black Spinning Top Long Legged Doji Dragonfly Doji Grave stone Doji Doji Four price Doji Highwave

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/**
 *Copyright 2017 Pallav Nandi Chaudhuri@Knc Solutions Private Limited

  *Licensed under the Apache License, Version 2.0 (the "License");
  *you may not use this file except in compliance with the License.
  *You may obtain a copy of the License at

  * http://www.apache.org/licenses/LICENSE-2.0

  *Unless required by applicable law or agreed to in writing, software
  *distributed under the License is distributed on an "AS IS" BASIS,
  *WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *See the License for the specific language governing permissions and
  *limitations under the License.
 * 
 */
 
 package in.kncsolutions.dhelm.candlebasic;
 
 import java.util.*; 
 import in.kncsolutions.dhelm.exceptions.DataException;
 import in.kncsolutions.dhelm.mathcal.CandleFacts;
 
 /**
 *According to litarature a long Black candle is made of Black body, i.e closing
 *price is lower than the opening price.The upper and lower shadows are required.
 *It means the high and low prices cannot be equal to opening and closing prices respectively.
 *None of the shadows can be greater than the body. The body of the candle must be greater 
 *than the average body length of some predefined previous candles. It also appears as a long
 *candle. It means that the length of the candle including the shadow must be greater than the
 *average candle length of certain previous candles. The goal of this class is to calculate if a candle
 *is long Black candle or not.   
 */
 
 public class LongBlackCandle{
   private List Open=new ArrayList();
   private List High=new ArrayList();
   private List Low=new ArrayList();
   private List Close=new ArrayList();
   private int RefBody;
   private int RefLength;
   private double Percentage;
   private boolean isLongBlackCandle;
   
 
 /**
  *@param open : List of opening prices where first element is the latest data.
  *@param high : List of high prices where first element is the latest data.
  *@param low : List of low prices where first element is the latest data.
  *@param close : List of closing prices where first element is the latest data.
  *@param numBody : Number of previous periods w.r.t which it is to be found that if the latest candle's body  is greater than the average body length of those past consecutive periods or not. 
  *@param numLen :  Number of previous periods w.r.t which it is to be found that if the latest candle is long or short.
  *@param percentage : The percentage by which if the latest candle is longer than the previous candles, it will be treated as a long candle, otherwise short. 
  *@throws DataException if sufficient data not available.
  */
   public LongBlackCandle(List open,List high,List low,List close, int numBody , int numLen, double percentage) throws DataException{
     Open.addAll(open);
	 High.addAll(high);
	 Low.addAll(low);
	 Close.addAll(close);
	 RefBody=numBody;
	 RefLength=numLen;
	 Percentage=percentage;
	 isLongBlackCandle=false;
	 if(Open.size()<((RefBody>RefLength) ? RefBody : RefLength)
        || (Open.size()!=Close.size() || Open.size()!=High.size() || Open.size()!=Low.size() )){		
	   throw new DataException();
	 }
	 else{
	   LongBlackCandle();
	 }
   }
   /*
   *
   */
   private void LongBlackCandle()throws DataException{
       double avgBodyLength=CandleFacts.getAverageLength(Open,Close,RefBody); 
	   double avgCandleLength=CandleFacts.getAverageLength(High,Low,RefLength); 
	   if(Open.get(0)>Close.get(0)){         
          if((High.get(0)!=Open.get(0))&&(Low.get(0)!=Close.get(0))){
            if(((High.get(0)-Open.get(0))<(Open.get(0)-Close.get(0))) &&  ((Close.get(0)-Low.get(0))<(Open.get(0)-Close.get(0))) ){
                if((Open.get(0)-Close.get(0))>=3*avgBodyLength && (High.get(0)-Low.get(0))>avgCandleLength*Percentage/100){
                   isLongBlackCandle=true; 				  
                }
            }
          }
	   }
	}
   /**
   *@return Returns true if the latest candle is long Black candle; otherwise returns false. 
   */
   public boolean isLongBlackCandle(){
     return isLongBlackCandle;
   }
  
 }