编写条件：
试图找一macd指标，能统计某一时间段内0轴上交叉点的个数和轴下交叉点个数编写方法：
N:=240;
DIFF:=EMA(CLOSE,12) - EMA(CLOSE,26);
DEA :=EMA(DIFF,9);
轴上死叉:=CROSS(DEA,DIFF) AND DEA>0;
轴下金叉:=CROSS(DIFF,DEA) AND DEA<0;
轴下死叉:=CROSS(DEA,DIFF) AND DEA<0;
轴上交叉点数:COUNT(轴上金叉,240)+COUNT(轴上死叉,240);
轴下交叉点数:COUNT(轴下金叉,240)+COUNT(轴下死叉,240);
