macd 함수 값에 대한 요청

exchange.SetRate();
exchange.SetContractType("quarter");
exchange.SetMarginLevel(20);    
Log("PERIOD_M15");    
var records2 = exchange.GetRecords(PERIOD_M15);
var macd = TA.MACD(records2, 12, 26, 9);
Log(macd[0].length);
Log("dif0="+_N(macd[0][macd[0].length-1],4));
Log("dif1="+_N(macd[0][macd[0].length-2],4));
Log("dif2="+_N(macd[0][macd[0].length-3],4));    
Log(macd[1].length);
Log("dea0="+_N(macd[1][macd[1].length-1],4));
Log("dea1="+_N(macd[1][macd[1].length-2],4));
Log("dea2="+_N(macd[1][macd[1].length-3],4));    
Log(macd[2].length);
Log("macd0="+_N(macd[2][macd[2].length-1],4));
Log("macd1="+_N(macd[2][macd[2].length-2],4));
Log("macd2="+_N(macd[2][macd[2].length-3],4));

测试代码如下，输出来的数据和交易所网站上的macd的dif,dea,macd都不一样，是怎么回事啊？哪个地方弄错了吗？