编写要求：
股票网解答：
网友求助：
求MACD0轴之上金叉然后死叉然后再金叉，也就是二次金叉的预警公式！要通达信的！谢谢老师！
解答如下：
DIFF:=EMA(CLOSE,5)-EMA(CLOSE,26);
DEA:=EMA(DIFF,50);
MACD:=2*(DIFF-DEA);
JCCOUNT:=COUNT(CROSS(DIFF,DEA),BARSLAST(DEA>=0));
二次金叉:CROSS(DIFF,DEA) AND DEA>0 AND COUNT(JCCOUNT=2,21)=1;
DEA:=EMA(DIFF,50);
MACD:=2*(DIFF-DEA);
JCCOUNT:=COUNT(CROSS(DIFF,DEA),BARSLAST(DEA>=0));
二次金叉:CROSS(DIFF,DEA) AND DEA>0 AND COUNT(JCCOUNT=2,21)=1;
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