records = exchange.GetRecords(PERIOD_M15); if (records && records.length > 7) { var ma7 = TA.MA(records, 7); } if (records && records.length > 30) { var ma30 = TA.MA(records, 30); }
왜 상위 평균선만 표시되고, ma30은 표시되지 않는가?