DIF和DEA在零轴上方，MACD绿柱连续三天缩短选股

DIF:=EMA(CLOSE,12)-EMA(CLOSE,26);

DEA:=EMA(DIF,9);

MACD:=2*(DIF-DEA);

绿连3短:DIF>0 AND DEA>0 AND MACD<0 AND MACD>REF(MACD,1) AND REF(MACD,1)>REF(MACD,2);