编写条件：
macd三次底背离的选股公式。
编写方法：
DIFF:=Ema(CLOSE,12) - EMA(CLOSE,26); DEA:=EMA(DIFF,9); A1:=BArslAst(REF(crOSS(DIFF,DEA),1)); A2:=REF(CLOSE,A1+1)>CLOSE AND DIFF>REF(DIFF,A1+1) AND CROSS(DIFF,DEA); 三次底背离:COUNT(A2,60)=3;
