TB_PriceLimit 和 TB_PriceLimit获取期货合约的结算价与涨跌停时，只能用在连续合约不可以用在具体的主力合约上吗？

测试发现在主力合约上面取值是0啊？

Dic<Array<Numeric>> mysettleprice(\"TB_SettlePrice\");  //结算价

Dic<Array<Numeric>> mypricelimit(\"TB_PriceLimit\");    //停板比例

Series<Numeric> myuplimit;   //涨停价

Series<Numeric> mydnlimit;     //跌停价 

Events

OnInit()

{ 

  Range[0:datasourcesize-1]

    {

AddDataFlag(Enum_Data_RolloverBackWard());//设置后复权

    AddDataFlag(Enum_Data_RolloverRealPrice());//是否映射真实价格

    AddDataFlag(Enum_Data_AutoSwapPosition());//设置自动换仓

    AddDataFlag(Enum_Data_IgnoreSwapSignalCalc()); // 设置忽略换仓信号计算

    }

}

    onBar(ArrayRef<Integer> indexs)

    { 

    //===========================================================================

    //计算涨跌停价格,开平仓价格不能在涨跌停板报单，否则历史信号与实际情况不符。

    Numeric myjump=MinMove*pricescale;

    If(ExchangeCode==\"CZCE\")

    {

        myuplimit=RoundUp(mysettleprice[0][0]*(1+0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

        mydnlimit=RoundDown(mysettleprice[0][0]*(1-0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

    }Else If(ExchangeCode==\"DCE\")

    {

        myuplimit=RoundDown(mysettleprice[0][0]*(1+0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

        mydnlimit=RoundUp(mysettleprice[0][0]*(1-0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

    }Else If(ExchangeCode==\"SHFE\")

    {

        myuplimit=RoundDown(mysettleprice[0][0]*(1+0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

        mydnlimit=RoundDown(mysettleprice[0][0]*(1-0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

    }Else If(ExchangeCode==\"CFFEX\")

    {

        myuplimit=RoundDown(mysettleprice[0][0]*(1+0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

        mydnlimit=RoundUp(mysettleprice[0][0]*(1-0.01*mypricelimit[0][0])*RollOver/myjump,0)*myjump;

    }

    If(myuplimit<=mydnlimit) Return;