M1:=5; M2:=30; M3:=70; M4:=90;现价: EMA(CLOSE,2),COLORYELLOW; 底部: COST(M1),COLORBLUE,LINETHICK2; 买入: COST(M2),COLORRED,LINETHICK2; 卖出: COST(M3),COLORGREEN,LINETHICK2; 顶部: COST(M4),COLORFFFF33,LINETHICK2;