返回值错误问题！

请问各位老师：编了一段程序，想求出当下K线的“真实波动幅度”在前两天和当天开盘至当前所有K线中的排序，如果排序在前7名之内，返回对应的排序，否则返回“-1”代码如下。现在返回值于实际情况不符，是什么问题？Params Integer tianshu(2); //样本天数 Vars Series<Integer> zongyangben; //总样本 Series<Integer> mingci; //名次 Events OnBar(ArrayRef<Integer> indexs) { zongyangben = DayBarsNumI(0,1)*tianshu + DayBarsNumI(0,0); if (TrueRange == NthHigher(TrueRange,zongyangben,7)) mingci = 7;Else If (TrueRange == NthHigher(TrueRange,zongyangben,6)) mingci = 6;Else If (TrueRange == NthHigher(TrueRange,zongyangben,5)) mingci = 5;Else If (TrueRange == NthHigher(TrueRange,zongyangben,4)) mingci = 4;Else If (TrueRange == NthHigher(TrueRange,zongyangben,3)) mingci = 3;Else If (TrueRange == NthHigher(TrueRange,zongyangben,2)) mingci = 2;Else If (TrueRange == NthHigher(TrueRange,zongyangben,1)) mingci = 1;Else mingci = -1; Commentary(名次：+Text(mingci)); Commentary(K线范围：+Text(TrueRange)); Commentary(总样本：+Text(zongyangben)); Commentary(大1K线：+Text(NthHigher(TrueRange,zongyangben,1))); Commentary(大2K线：+Text(NthHigher(TrueRange,zongyangben,2))); Commentary(大3K线：+Text(NthHigher(TrueRange,zongyangben,3))); Commentary(大4K线：+Text(NthHigher(TrueRange,zongyangben,4))); Commentary(大5K线：+Text(NthHigher(TrueRange,zongyangben,5))); Commentary(大6K线：+Text(NthHigher(TrueRange,zongyangben,6))); Commentary(大7K线：+Text(NthHigher(TrueRange,zongyangben,7))); }