A1:=Ema(C,7)-EMA(C,21); B1:=EMA((0.668*REF(A1,1)+0.333*A1),1); X1:=V/SUM(V,13); X2:=DMA(C,X1); X3:=(C-X2)/X2*40; 做多:=IF(A1>=B1,A1,B1); 主力强度:X3>0 AND 做多>0;