Question: 贵州茅台从2025年05月24日到2025年07月15日，双指数移动平均的5日线与20日线发生金叉多少次？（平滑系数 alpha 取 2 / (n + 1)；从前 5n 个数据开始计算；初始值用首个数据点）使用不复权价格，写出指标公式，搜集原始数据，计算得出答案，保留四位小数。注意列出原始数据和关键计算过程。
Formula: DEMA = 2 * EMA1 - EMA2；EMA1 = EMA_n(P)；EMA2 = EMA_n(EMA1)
Data:
date,close
2024-12-20,1522.0
2024-12-23,1526.45
2024-12-24,1538.82
2024-12-25,1530.0
2024-12-26,1527.79
2024-12-27,1528.97
2024-12-30,1525.0
2024-12-31,1524.0
2025-01-02,1488.0
2025-01-03,1475.0
2025-01-06,1440.0
2025-01-07,1440.2
2025-01-08,1442.5
2025-01-09,1444.0
2025-01-10,1436.0
2025-01-13,1443.98
2025-01-14,1472.5
2025-01-15,1471.27
2025-01-16,1446.38
2025-01-17,1454.75
2025-01-20,1474.8
2025-01-21,1468.15
2025-01-22,1441.0
2025-01-23,1443.0
2025-01-24,1436.0
2025-01-27,1434.99
2025-02-05,1403.8
2025-02-06,1412.84
2025-02-07,1436.0
2025-02-10,1431.51
2025-02-11,1418.0
2025-02-12,1443.0
2025-02-13,1465.06
2025-02-14,1475.0
2025-02-17,1471.62
2025-02-18,1475.0
2025-02-19,1491.0
2025-02-20,1474.0
2025-02-21,1488.21
2025-02-24,1479.07
2025-02-25,1454.0
2025-02-26,1460.01
2025-02-27,1485.56
2025-02-28,1500.79
2025-03-03,1487.02
2025-03-04,1470.11
2025-03-05,1466.37
2025-03-06,1505.98
2025-03-07,1521.0
2025-03-10,1522.9
2025-03-11,1548.68
2025-03-12,1542.58
2025-03-13,1537.77
2025-03-14,1628.01
2025-03-17,1637.86
2025-03-18,1624.0
2025-03-19,1635.71
2025-03-20,1604.0
2025-03-21,1573.75
2025-03-24,1583.0
2025-03-25,1575.5
2025-03-26,1576.0
2025-03-27,1589.0
2025-03-28,1585.21
2025-03-31,1561.0
2025-04-01,1556.02
2025-04-02,1549.02
2025-04-03,1568.88
2025-04-07,1500.0
2025-04-08,1545.0
2025-04-09,1541.04
2025-04-10,1549.0
2025-04-11,1568.98
2025-04-14,1551.99
2025-04-15,1558.0
2025-04-16,1559.17
2025-04-17,1570.0
2025-04-18,1565.94
2025-04-21,1551.0
2025-04-22,1548.8
2025-04-23,1552.0
2025-04-24,1552.25
2025-04-25,1550.0
2025-04-28,1550.0
2025-04-29,1544.0
2025-04-30,1547.0
2025-05-06,1550.2
2025-05-07,1555.0
2025-05-08,1578.19
2025-05-09,1591.18
2025-05-12,1604.5
2025-05-13,1590.3
2025-05-14,1634.99
2025-05-15,1632.01
2025-05-16,1614.13
2025-05-19,1578.98
2025-05-20,1586.0
2025-05-21,1580.97
2025-05-22,1580.0
2025-05-23,1572.6
2025-05-26,1550.5
2025-05-27,1543.9
2025-05-28,1537.0
2025-05-29,1540.0
2025-05-30,1522.0
2025-06-03,1509.0
2025-06-04,1509.96
2025-06-05,1514.0
2025-06-06,1506.39
2025-06-09,1486.11
2025-06-10,1475.01
2025-06-11,1480.0
2025-06-12,1459.0
2025-06-13,1426.95
2025-06-16,1422.29
2025-06-17,1427.0
2025-06-18,1425.0
2025-06-19,1426.0
2025-06-20,1428.66
2025-06-23,1420.0
2025-06-24,1437.2
2025-06-25,1435.86
2025-06-26,1420.0
2025-06-27,1403.09
2025-06-30,1409.52
2025-07-01,1405.1
2025-07-02,1409.6
2025-07-03,1415.6
2025-07-04,1422.22
2025-07-07,1410.7
2025-07-08,1416.11
2025-07-09,1418.88
2025-07-10,1426.5
2025-07-11,1427.0
2025-07-14,1423.6
2025-07-15,1411.0

Indicator data:
date,5日,20日
2025-02-21,1487.8943258905533,1465.5247411912712
2025-02-24,1485.0836466344701,1468.2571842088919
2025-02-25,1469.2384951168253,1466.0441755751626
2025-02-26,1463.841928318225,1465.2136249650111
2025-02-27,1475.2121288168219,1469.1214633547513
2025-02-28,1489.8764258365513,1475.2323109857653
2025-03-03,1489.9565105301476,1477.9684714185382
2025-03-04,1480.271380335063,1477.2228025535876
2025-03-05,1472.7600579889072,1475.8694291511806
2025-03-06,1490.7172416140704,1481.8608905687008
2025-03-07,1508.7385186014685,1489.7089495470454
2025-03-10,1519.1659174179267,1496.7618146105247
2025-03-11,1538.5374371788055,1507.4489734075173
2025-03-12,1544.8850640526616,1515.4648201922892
2025-03-13,1544.7778911018577,1521.399925427059
2025-03-14,1594.0849374457387,1542.7769170099243
2025-03-17,1625.2408538823815,1562.8359335481891
2025-03-18,1632.7900552006245,1577.4223309090073
2025-03-19,1641.6741385419966,1591.9094060192551
2025-03-20,1627.3432713001623,1598.413343639941
2025-03-21,1601.5747446037735,1598.3005729063989
2025-03-24,1592.169316671626,1599.6635830505384
2025-03-25,1582.8036468493792,1599.2676472905205
2025-03-26,1578.107388389561,1598.8186599922699
2025-03-27,1583.0082303641352,1600.6024263082843
2025-03-28,1583.7465789790417,1601.2698411265342
2025-03-31,1570.7873362546623,1597.278678733977
2025-04-01,1561.1735243488647,1592.7790770590357
2025-04-02,1552.4392163519692,1587.4924727214163
2025-04-03,1559.2107220920193,1586.4186539985906
2025-04-07,1525.0279777440394,1572.8853134658596
2025-04-08,1532.0547605067109,1569.3091747216886
2025-04-09,1534.4161350115971,1565.4429099018867
2025-04-10,1540.6238420124796,1563.5006576579956
2025-04-11,1555.4135071225967,1565.403705978457
2025-04-14,1554.055190824582,1563.911881987012
2025-04-15,1556.5609179338444,1563.6727981120466
2025-04-16,1558.4844724342006,1563.6378764083943
2025-04-17,1565.43222194167,1565.5333906019273
2025-04-18,1566.7720859514711,1566.3890528728061
2025-04-21,1558.9751270723302,1564.375215839464
2025-04-22,1553.401464562453,1562.206290595939
2025-04-23,1552.190785162235,1560.8897210374441
2025-04-24,1551.770395966334,1559.7767040425088
2025-04-25,1550.3868456607854,1558.3891622027322
2025-04-28,1549.7289515626767,1557.1772364590354
2025-04-29,1546.133337345442,1555.0316261658138
2025-04-30,1545.9649157660667,1553.7193998154366
2025-05-06,1547.7828488678924,1553.1647709906115
2025-05-07,1551.526058150049,1553.5546120569961
2025-05-08,1566.459033592113,1558.0936464713657
2025-05-09,1581.616018945018,1564.348015717855
2025-05-12,1596.815121441307,1572.1275060469059
2025-05-13,1596.5352646128458,1576.2134153090362
2025-05-14,1620.5458543987688,1587.7929154958686
2025-05-15,1631.1665771482049,1597.1593279799115
2025-05-16,1626.0472786870425,1601.8991864715667
2025-05-19,1602.92011507241,1599.5137265386898
2025-05-20,1593.8813629023057,1598.648225536596
2025-05-21,1586.1939882820031,1596.9125367295617
2025-05-22,1581.6580453083127,1595.171144878637
2025-05-23,1575.346732285749,1592.2656413917928
2025-05-26,1559.9587340217486,1585.699769908079
2025-05-27,1548.4019865686653,1578.8084350208842
2025-05-28,1538.9321003041096,1571.5988984350313
2025-05-29,1536.175250819406,1565.9276097701038
2025-05-30,1525.3749565129374,1557.7846491190396
2025-06-03,1512.977608319736,1548.4360155781999
2025-06-04,1507.5590526427868,1540.599732651769
2025-06-05,1507.6620220482778,1534.639966059822
2025-06-06,1504.1842282231319,1528.1936268218808
2025-06-09,1491.6169611649411,1519.0400146400568
2025-06-10,1479.2529578985298,1509.2346312926675
2025-06-11,1476.058627791399,1501.8027902187941
2025-06-12,1463.4101891002965,1491.7118473876299
2025-06-13,1439.49308422644,1477.3406960234558
2025-06-16,1424.8806949240106,1464.2741463033635
2025-06-17,1420.7151113535963,1454.0515589243007
2025-06-18,1418.4509507274572,1445.0752317598135
2025-06-19,1418.727884812789,1437.7265808903826
2025-06-20,1421.136757204849,1432.0871947510943
2025-06-23,1418.2321719118922,1425.8687657821883
2025-06-24,1426.693226013701,1423.8453464604113
2025-06-25,1430.8766693907605,1422.0670340771842
2025-06-26,1424.478569848258,1417.85932680586
2025-06-27,1411.7429067351168,1411.3667652816619
2025-06-30,1408.693400158708,1407.1433599044235
2025-07-01,1404.974352773781,1402.9058479298185
2025-07-02,1405.8354036278379,1400.273273747162
2025-07-03,1409.9697147154366,1399.2912955727224
2025-07-04,1416.1105513415432,1399.836285814755
2025-07-07,1413.1186396929747,1398.3956425814556
2025-07-08,1414.5257189943914,1398.309350568877
2025-07-09,1416.866007684533,1398.9026639048948
2025-07-10,1422.363246248537,1400.9518599563294
2025-07-11,1425.5438804715902,1402.9517518718458
2025-07-14,1425.2303978516593,1404.190196257365
2025-07-15,1417.9099169259503,1403.094317885807

Answer: 5.0