网格交易辅助指标

同花顺自用指标，备份一下。

//#@comment=
//#@param=PERIOD=120,5,480,1;
//#@coord=D
//#@ordinate=0,0.000000;0,0.000000;0,0.000000;0,0.000000;0,0.000000;0;0,0.000000
//#@isDrawCurve=1
//#@Fdesc=网格交易辅助
//#@FuncType=
//#@style=区间最高价:Line2,一般价格,1,0,1,0,30065;区间最低价:Line2,一般价格,1,0,1,0,30061;区间日平均波动:Line258,一般价格,1,0,1,0,30080;
//#@control=
//#@availperiod=2147430400
//#@defaultperiod=16384
//#@Fname=网格交易辅助
//#@@FUNCSPEC@=source
区间最高价: HHV(HIGH, PERIOD);
区间最低价: LLV(LOW, PERIOD);
区间日平均波动: MA(HIGH - LOW, PERIOD);