为何天勤的SAR计算结果和快期3相差那么大？2月2日5分钟最后一根K的SAR分别为3121和3155？

symbol = 'CFFEX.IF2402'
# ks_1d = [api.get_kline_serial(domain, duration_seconds=24*60*60) for domain in domains]
ks_5m = api.get_kline_serial(symbol, duration_seconds=5*60)
# print(ks_5m)
sar = SAR(ks_5m, 4, 0.02, 0.2)
# sar = SAR(ks_1d[i], 4, 2, 20)
s = list(sar["sar"])
ks_5m['sar'] = sar["sar"]
print(ks_5m[-10:])

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