【MultiCharts】布林通道

Inputs: blen(20),bnum(2);
Inputs: slen(20),snum(2);

value1 = BollingerBand(close,blen,bnum);
value2 = BollingerBand(close,slen,-snum);

if close cross over value1  then
    buy next bar at market;

if close cross under value2 then
    sellshort next bar at market;