private int period = 0;       // default = DAILY   
  private int lookback = 2;   //   DAILY *2


public IndicatorResult calculate(int startIndex, int endIndex) {

int inputLength = inputs[1].length - 1;  
        if (  inputLength < lookback || startIndex > endIndex || 
              calculationTimeframe.getPeriod().isSmallerThan(displayTimeframe.getPeriod()) )
          {
              new IndicatorResult(0, 0);
          }  
       
        int lastBar = -1;
        if (inputs[1].length > lookback)
        {
           lastBar = getTimeIndex(inputs[1][inputs[1].length - lookback].getTime(), inputs[0]);
        }
        if (lastBar == -1)
        {
              new IndicatorResult(0, 0);
          }      
 
 if (startIndex != endIndex) {
            highest = 0.0;
            lowest = 0.0;
}

//这里想要指标起始时间从以前一天或二天到现在最新BAR数来运算。
for ( i = inputs[0].length-1,j=0; i > lastBar; i--,j--) {

double todayHigh = inputs[0][i].getHigh();
double todayLow = inputs[0][i].getLow();
  ....
  ....
outputs[0][j] = Double.parseDouble();
        }
       
 return new IndicatorResult(startIndex, j);    
}