M1:=MA(C,30); 首次上穿1:=O<=M1 AND C>M1; 首次上穿2:=O>=M1 AND C>M1 AND C>O AND REF(C,1)M1 AND REF(C,1)>REF(M1,1) AND REF(C,2)>REF(M1,2); 输出1:三天有效 AND 连续三日;