anchor.diff:    double low;
     double close;
     String time;
  +  DateTime datetime;
     ForexDailyValue();
     ForexDailyValue.fromData(this.pair,this.date,this.open,this.high,this.low,this.close);
     ForexDailyValue.fromString(String line,{String pairName})
  
positive.code:     time=json["time"];
    }
  
     Map toJsonMap()
     {
        return{"pair":pair,"date":date,"open":open,"high":high,"low":low,"close":close};
     }
  }
  
  
  
negative.code:     else
        date = vals[0].substring(0,4)+"-"+vals[0].substring(4,6)+"-"+vals[0].substring(6,8);
  
      datetime = DateTime.parse(date);
      open = double.parse(vals[1]);
      high = double.parse(vals[2]);
      low  = double.parse(vals[3]);
  