var arecords = _C(exchange.GetRecords, 300);
var time = arecords[arecords.length - 1].Time
var nowtime = time;
var atremaarr = [];
var Onoff = 0;

function main() {
    while (true) {
        //这里开始    把这段放循环里   
        var Num = 50; //可以改，几根的平均值
        var records = _C(exchange.GetRecords, 300);
        var atr = TA.EMA(records, 9)