参数设置 M=12,N=3.                                                                                     MON:C-REF(C,N);
MID:=MA(MON,20);
AA:=POW((MON-MID),2);
BB:=MA(AA,20);
CC:=SQRT(BB);
SG:MID 2*CC;
LG:MID-2*CC; M=12;
XG:CROSS(MON,LG)COLORBLUE;
 用法说明                                                       低位跌破下轨，出现蓝色三角，为买进信号，配合趋势买卖指标，同时跌破趋势买卖下轨，为强烈买进信号