请问用TALIB获得的KDJ指标为什么与通达信下载的数据不一致？我的代码哪用的不对？

代码：

tadata_1m = C.get_market_data_ex(['close', 'high', 'low', 'open', 'volume'], [C.stock], period = '1m', count = 1000)[C.stock],

用TALIB获取KD值

tadata_1m['K'], tadata_1m['D'] = talib.STOCH(tadata_1m['high'], tadata_1m['low'], tadata_1m['close'], fastk_period=9, slowk_period=3, slowd_period=3)