布林预警 (文华财经随身行Android   5.4.6（239）)

 参考：

MID:MA(CLOSE,26);//求N个周期的收盘价均线，称为布林通道中轨
TMP2:=STD(CLOSE,26);//求M个周期内的收盘价的标准差
TOP:MID+2*TMP2;//布林通道上轨
BOTTOM:MID-2*TMP2;
CROSS(C,MID),SPARK;
DRAWICON(CROSS(C,MID),MID,1);
CROSSDOWN(C,MID),SPARK;
DRAWICON(CROSSDOWN(C,MID),MID,2);