编写要求：
macd指标0轴下金叉后一段时间dif回踩dea，回踩差点或者刚刚接触上都行，转天dif有掉头向上。
www.gszx.com.cn网解答：
REF("MACD.DIF",1)<REF("MACD.DIF",2) AND REF("MACD.MACD",1)<REF("MACD.MACD",2)
AND REF("MACD.DIF",1)-REF("MACD.DEA",1)>0
AND REF("MACD.DIF",1)<"MACD.DIF"
AND REF("MACD.DIF",1)-REF("MACD.DEA",1)<0.03
AND REF("MACD.MACD",1)<"MACD.MACD";
