MACD在零轴金叉的选股公式

编写要求：

MACD在零轴金叉的选股公式。

www.gszx.com.cn网解答：

DIFF:=EMA(CLOSE,12)-EMA(CLOSE,26);
DEA:=EMA(DIFF,9);
CROSS(DIFF,DEA) AND RANGE(DEA,-0.02,0.02);