在loop里这样写 var records = exchange.GetRecords(Kzhouqi); if(records && records.length > 20){ var boll = TA.BOLL(records, 20, 2); Log(boll[1]); }
返回值: [null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,11169.6295,11169.244499999999,11165.2815,11158.541999999998……… 回测使用的是okex期货,如果想取upline和downline该怎么写?