Question: 在2023年05月18日-2024年02月24日，晶科能源的价格有多少次突破20日加权移动平均线？（权重取 1, 2, ..., n）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: WMA_n = \sum_{i=0}^{n-1} (n-i) * P_{t-i} / \sum_{j=1}^{n} j
Data:
date,close,low,high,open
2023-04-18,13.62,13.47,13.8,13.47
2023-04-19,13.33,13.15,13.64,13.56
2023-04-20,12.63,12.59,13.2,13.1
2023-04-21,12.43,12.38,12.93,12.6
2023-04-24,12.34,12.0,12.9,12.8
2023-04-25,12.0,11.94,12.57,12.31
2023-04-26,12.73,11.89,13.07,12.07
2023-04-27,12.6,12.46,12.83,12.7
2023-04-28,12.52,12.36,12.68,12.68
2023-05-04,12.3,12.1,12.74,12.21
2023-05-05,12.17,11.91,12.35,12.34
2023-05-08,11.99,11.91,12.26,12.26
2023-05-09,11.7,11.64,12.16,12.0
2023-05-10,11.49,11.12,11.6,11.51
2023-05-11,11.68,11.39,11.98,11.48
2023-05-12,11.31,11.31,11.83,11.62
2023-05-15,12.03,11.3,12.1,11.38
2023-05-16,12.11,11.91,12.33,12.0
2023-05-17,12.33,12.12,12.53,12.19
2023-05-18,12.19,12.1,12.42,12.35
2023-05-19,12.31,12.07,12.37,12.2
2023-05-22,12.55,12.22,12.71,12.3
2023-05-23,12.8,12.48,12.98,12.51
2023-05-24,13.03,12.68,13.44,12.74
2023-05-25,13.41,12.88,13.83,13.08
2023-05-26,13.06,12.62,13.31,13.3
2023-05-29,12.34,12.1,13.13,13.0
2023-05-30,12.31,12.12,12.68,12.4
2023-05-31,12.73,12.1,12.73,12.3
2023-06-01,12.23,12.17,12.59,12.58
2023-06-02,12.5,12.19,12.64,12.29
2023-06-05,11.97,11.96,12.53,12.52
2023-06-06,11.73,11.6,11.98,11.96
2023-06-07,11.6,11.49,11.85,11.77
2023-06-08,11.67,11.55,11.95,11.57
2023-06-09,12.71,11.56,12.89,11.67
2023-06-12,12.65,12.48,12.84,12.8
2023-06-13,12.44,12.32,12.79,12.65
2023-06-14,12.18,12.15,12.53,12.49
2023-06-15,13.16,12.11,13.29,12.21
2023-06-16,13.48,13.29,13.73,13.31
2023-06-19,13.64,13.3,13.72,13.48
2023-06-20,13.48,13.37,13.7,13.55
2023-06-21,13.35,13.29,13.65,13.45
2023-06-26,13.76,13.24,14.3,13.42
2023-06-27,14.03,13.51,14.57,13.76
2023-06-28,14.21,13.81,14.29,14.05
2023-06-29,14.0,13.88,14.53,14.25
2023-06-30,14.06,13.73,14.38,14.0
2023-07-03,14.15,13.86,14.35,14.09
2023-07-04,13.65,13.58,14.14,13.99
2023-07-05,13.26,13.19,13.64,13.64
2023-07-06,12.95,12.88,13.42,13.27
2023-07-07,12.52,12.49,12.96,12.96
2023-07-10,13.12,12.52,13.29,12.6
2023-07-11,12.84,12.78,13.15,13.05
2023-07-12,12.9,12.35,13.02,12.83
2023-07-13,13.08,12.86,13.25,12.9
2023-07-14,12.5,12.28,13.01,12.97
2023-07-17,12.56,12.43,12.87,12.73
2023-07-18,12.36,12.29,12.62,12.61
2023-07-19,12.2,12.04,12.39,12.38
2023-07-20,12.27,12.21,12.44,12.27
2023-07-21,12.07,12.01,12.3,12.26
2023-07-24,11.98,11.93,12.24,12.0
2023-07-25,12.47,12.18,12.59,12.21
2023-07-26,12.44,12.37,12.69,12.46
2023-07-27,12.37,12.33,12.56,12.46
2023-07-28,12.59,12.21,12.7,12.3
2023-07-31,12.43,12.41,12.76,12.59
2023-08-01,12.14,12.03,12.48,12.43
2023-08-02,12.13,12.06,12.24,12.13
2023-08-03,12.26,12.1,12.46,12.1
2023-08-04,12.36,12.13,12.43,12.3
2023-08-07,12.23,12.14,12.38,12.35
2023-08-08,12.09,12.07,12.39,12.25
2023-08-09,12.06,11.96,12.17,12.09
2023-08-10,12.22,12.0,12.33,12.0
2023-08-11,11.98,11.96,12.26,12.26
2023-08-14,11.84,11.59,11.9,11.83
2023-08-15,10.42,10.32,11.81,11.81
2023-08-16,10.45,10.35,10.65,10.53
2023-08-17,10.69,10.3,10.74,10.43
2023-08-18,10.71,10.71,10.96,10.79
2023-08-21,10.34,10.32,10.74,10.7
2023-08-22,10.24,9.92,10.44,10.42
2023-08-23,9.98,9.94,10.2,10.2
2023-08-24,10.37,9.96,10.49,9.96
2023-08-25,10.41,10.22,10.52,10.3
2023-08-28,10.62,10.58,11.2,11.11
2023-08-29,10.95,10.48,10.99,10.51
2023-08-30,10.91,10.78,11.29,11.15
2023-08-31,10.76,10.61,11.0,10.88
2023-09-01,10.77,10.66,10.8,10.76
2023-09-04,10.65,10.6,10.85,10.77
2023-09-05,10.77,10.54,10.89,10.65
2023-09-06,10.53,10.51,10.75,10.73
2023-09-07,10.12,10.12,10.53,10.48
2023-09-08,10.15,10.02,10.22,10.07
2023-09-11,10.12,10.06,10.27,10.17
2023-09-12,10.1,9.94,10.22,10.11
2023-09-13,9.92,9.81,10.16,10.12
2023-09-14,9.79,9.73,9.94,9.9
2023-09-15,9.97,9.74,9.98,9.83
2023-09-18,9.97,9.69,10.04,9.81
2023-09-19,9.81,9.81,10.03,9.98
2023-09-20,9.83,9.76,9.92,9.83
2023-09-21,9.84,9.73,9.92,9.76
2023-09-22,9.98,9.76,9.99,9.82
2023-09-25,9.91,9.83,10.03,9.93
2023-09-26,9.76,9.75,10.01,9.9
2023-09-27,10.12,9.8,10.31,9.81
2023-09-28,10.1,10.06,10.3,10.08
2023-10-09,9.75,9.73,10.06,9.97
2023-10-10,9.31,9.27,9.83,9.8
2023-10-11,9.52,9.32,9.63,9.47
2023-10-12,9.63,9.45,9.78,9.49
2023-10-13,9.4,9.3,9.62,9.58
2023-10-16,9.34,9.23,9.51,9.4
2023-10-17,9.28,9.23,9.4,9.34
2023-10-18,9.09,9.07,9.28,9.26
2023-10-19,9.32,9.22,9.62,9.38
2023-10-20,9.56,9.14,9.57,9.25
2023-10-23,9.25,9.14,9.46,9.42
2023-10-24,9.26,9.11,9.32,9.23
2023-10-25,9.26,9.23,9.43,9.27
2023-10-26,9.14,8.92,9.17,9.17
2023-10-27,9.4,9.03,9.47,9.11
2023-10-30,9.37,9.25,9.46,9.31
2023-10-31,9.48,9.35,9.8,9.72
2023-11-01,9.2,9.15,9.68,9.62
2023-11-02,8.88,8.88,9.17,9.11
2023-11-03,9.02,8.94,9.19,8.94
2023-11-06,9.44,9.05,9.65,9.07
2023-11-07,9.17,9.12,9.39,9.38
2023-11-08,9.58,9.13,9.79,9.15
2023-11-09,10.11,9.5,10.52,9.59
2023-11-10,10.02,9.9,10.14,10.0
2023-11-13,10.15,9.96,10.22,10.1
2023-11-14,10.45,10.11,10.59,10.26
2023-11-15,10.3,10.21,10.79,10.75
2023-11-16,10.02,9.94,10.27,10.24
2023-11-17,10.03,9.93,10.11,9.93
2023-11-20,9.77,9.68,10.05,10.02
2023-11-21,9.85,9.77,10.01,9.77
2023-11-22,9.68,9.67,9.84,9.78
2023-11-23,10.02,9.76,10.1,9.77
2023-11-24,9.88,9.84,10.05,9.95
2023-11-27,9.45,9.45,9.83,9.8
2023-11-28,9.25,9.18,9.46,9.43
2023-11-29,9.06,9.04,9.27,9.26
2023-11-30,8.88,8.79,9.13,9.07
2023-12-01,8.88,8.73,8.88,8.87
2023-12-04,8.72,8.72,8.94,8.93
2023-12-05,8.64,8.63,8.83,8.7
2023-12-06,8.69,8.57,8.85,8.6
2023-12-07,8.73,8.42,8.76,8.66
2023-12-08,8.74,8.6,8.74,8.7
2023-12-11,8.69,8.52,8.72,8.69
2023-12-12,8.59,8.55,8.74,8.7
2023-12-13,8.33,8.33,8.55,8.55
2023-12-14,8.34,8.34,8.49,8.41
2023-12-15,8.37,8.33,8.54,8.39
2023-12-18,8.15,8.11,8.41,8.33
2023-12-19,8.16,8.1,8.31,8.15
2023-12-20,8.03,8.01,8.21,8.19
2023-12-21,8.25,7.95,8.34,7.97
2023-12-22,8.37,8.16,8.47,8.25
2023-12-25,8.47,8.35,8.56,8.38
2023-12-26,8.37,8.36,8.51,8.45
2023-12-27,8.39,8.12,8.42,8.39
2023-12-28,8.98,8.33,9.06,8.35
2023-12-29,8.86,8.81,9.02,8.97
2024-01-02,8.71,8.7,8.89,8.83
2024-01-03,8.66,8.6,8.79,8.64
2024-01-04,8.52,8.44,8.67,8.64
2024-01-05,8.4,8.36,8.61,8.5
2024-01-08,8.35,8.3,8.55,8.38
2024-01-09,8.46,8.22,8.69,8.39
2024-01-10,8.49,8.36,8.65,8.4
2024-01-11,8.69,8.44,8.69,8.46
2024-01-12,8.71,8.6,8.96,8.62
2024-01-15,8.67,8.56,8.8,8.66
2024-01-16,8.92,8.56,9.04,8.65
2024-01-17,8.68,8.66,8.95,8.86
2024-01-18,9.1,8.57,9.1,8.61
2024-01-19,9.15,9.01,9.26,9.05
2024-01-22,8.83,8.72,9.1,9.04
2024-01-23,9.21,8.81,9.35,8.82
2024-01-24,9.19,8.92,9.31,9.26
2024-01-25,9.11,8.92,9.18,9.14
2024-01-26,9.04,9.0,9.22,9.0
2024-01-29,8.08,8.05,9.08,9.07
2024-01-30,7.99,7.96,8.25,8.06
2024-01-31,7.94,7.81,8.15,7.97
2024-02-01,8.0,7.89,8.14,7.9
2024-02-02,7.93,7.75,8.08,8.03
2024-02-05,7.7,7.28,7.98,7.95
2024-02-06,8.09,7.56,8.18,7.65
2024-02-07,8.06,8.0,8.28,8.11
2024-02-08,8.27,8.1,8.29,8.18
2024-02-19,8.23,8.16,8.36,8.36
2024-02-20,8.12,8.04,8.2,8.19
2024-02-21,8.24,8.0,8.39,8.06
2024-02-22,8.37,8.2,8.52,8.21
2024-02-23,8.55,8.44,8.78,8.5

Indicator data:
date,20日,close
2023-05-18,12.069571428571429,12.19
2023-05-19,12.072904761904761,12.31
2023-05-22,12.105333333333332,12.55
2023-05-23,12.165285714285714,12.8
2023-05-24,12.24633333333333,13.03
2023-05-25,12.360714285714286,13.41
2023-05-26,12.436666666666666,13.06
2023-05-29,12.439,12.34
2023-05-30,12.440333333333335,12.31
2023-05-31,12.48304761904762,12.73
2023-06-01,12.477142857142857,12.23
2023-06-02,12.497285714285713,12.5
2023-06-05,12.465380952380952,11.97
2023-06-06,12.410714285714286,11.73
2023-06-07,12.34352380952381,11.6
2023-06-08,12.282476190476192,11.67
2023-06-09,12.32052380952381,12.71
2023-06-12,12.346190476190475,12.65
2023-06-13,12.348904761904764,12.44
2023-06-14,12.325285714285714,12.18
2023-06-15,12.395714285714286,13.16
2023-06-16,12.492,13.48
2023-06-19,12.597952380952382,13.64
2023-06-20,12.68347619047619,13.48
2023-06-21,12.753380952380953,13.35
2023-06-26,12.860809523809522,13.76
2023-06-27,12.992285714285714,14.03
2023-06-28,13.136285714285718,14.21
2023-06-29,13.251380952380952,14.0
2023-06-30,13.364142857142856,14.06
2023-07-03,13.479142857142856,14.15
2023-07-04,13.537380952380952,13.65
2023-07-05,13.552999999999999,13.26
2023-07-06,13.53295238095238,12.95
2023-07-07,13.466142857142856,12.52
2023-07-10,13.452095238095238,13.12
2023-07-11,13.404476190476194,12.84
2023-07-12,13.361952380952381,12.9
2023-07-13,13.335380952380952,13.08
2023-07-14,13.250523809523807,12.5
2023-07-17,13.169857142857142,12.56
2023-07-18,13.072999999999997,12.36
2023-07-19,12.966238095238097,12.2
2023-07-20,12.873000000000001,12.27
2023-07-21,12.76647619047619,12.07
2023-07-24,12.657476190476192,11.98
2023-07-25,12.603619047619047,12.47
2023-07-26,12.554333333333332,12.44
2023-07-27,12.506809523809526,12.37
2023-07-28,12.488000000000003,12.59
2023-07-31,12.46095238095238,12.43
2023-08-01,12.414476190476192,12.14
2023-08-02,12.374238095238093,12.13
2023-08-03,12.351761904761904,12.26
2023-08-04,12.342095238095238,12.36
2023-08-07,12.320809523809523,12.23
2023-08-08,12.290428571428572,12.09
2023-08-09,12.260761904761903,12.06
2023-08-10,12.250333333333334,12.22
2023-08-11,12.221142857142855,11.98
2023-08-14,12.181095238095239,11.84
2023-08-15,12.009238095238096,10.42
2023-08-16,11.84947619047619,10.45
2023-08-17,11.720904761904764,10.69
2023-08-18,11.601761904761904,10.71
2023-08-21,11.453857142857144,10.34
2023-08-22,11.304238095238096,10.24
2023-08-23,11.14047619047619,9.98
2023-08-24,11.025571428571428,10.37
2023-08-25,10.924,10.41
2023-08-28,10.852809523809524,10.62
2023-08-29,10.821666666666667,10.95
2023-08-30,10.792380952380952,10.91
2023-08-31,10.754619047619046,10.76
2023-09-01,10.724952380952383,10.77
2023-09-04,10.691428571428572,10.65
2023-09-05,10.676857142857143,10.77
2023-09-06,10.645714285714286,10.53
2023-09-07,10.582809523809523,10.12
2023-09-08,10.532761904761903,10.15
2023-09-11,10.488571428571428,10.12
2023-09-12,10.450666666666667,10.1
2023-09-13,10.397142857142857,9.92
2023-09-14,10.333761904761905,9.79
2023-09-15,10.291809523809523,9.97
2023-09-18,10.253380952380953,9.97
2023-09-19,10.20147619047619,9.81
2023-09-20,10.153523809523811,9.83
2023-09-21,10.107238095238095,9.84
2023-09-22,10.076809523809525,9.98
2023-09-25,10.041761904761902,9.91
2023-09-26,9.995809523809523,9.76
2023-09-27,9.989809523809525,10.12
2023-09-28,9.985666666666665,10.1
2023-10-09,9.951333333333336,9.75
2023-10-10,9.87995238095238,9.31
2023-10-11,9.834952380952382,9.52
2023-10-12,9.806380952380952,9.63
2023-10-13,9.760190476190475,9.4
2023-10-16,9.711714285714285,9.34
2023-10-17,9.661380952380952,9.28
2023-10-18,9.596952380952379,9.09
2023-10-19,9.559238095238095,9.32
2023-10-20,9.547238095238095,9.56
2023-10-23,9.506809523809524,9.25
2023-10-24,9.470761904761904,9.26
2023-10-25,9.438095238095238,9.26
2023-10-26,9.396619047619048,9.14
2023-10-27,9.383190476190478,9.4
2023-10-30,9.369,9.37
2023-10-31,9.368190476190478,9.48
2023-11-01,9.342761904761906,9.2
2023-11-02,9.28952380952381,8.88
2023-11-03,9.255523809523812,9.02
2023-11-06,9.266666666666666,9.44
2023-11-07,9.253571428571428,9.17
2023-11-08,9.280190476190477,9.58
2023-11-09,9.357,10.11
2023-11-10,9.42295238095238,10.02
2023-11-13,9.498333333333333,10.15
2023-11-14,9.59842857142857,10.45
2023-11-15,9.678666666666667,10.3
2023-11-16,9.72647619047619,10.02
2023-11-17,9.771904761904764,10.03
2023-11-20,9.790333333333333,9.77
2023-11-21,9.81390476190476,9.85
2023-11-22,9.818476190476192,9.68
2023-11-23,9.853428571428571,10.02
2023-11-24,9.870857142857144,9.88
2023-11-27,9.84504761904762,9.45
2023-11-28,9.799809523809524,9.25
2023-11-29,9.737571428571428,9.06
2023-11-30,9.658857142857144,8.88
2023-12-01,9.580142857142857,8.88
2023-12-04,9.486857142857144,8.72
2023-12-05,9.389380952380952,8.64
2023-12-06,9.299190476190477,8.69
2023-12-07,9.21704761904762,8.73
2023-12-08,9.142428571428573,8.74
2023-12-11,9.069142857142857,8.69
2023-12-12,8.993285714285713,8.59
2023-12-13,8.901523809523809,8.33
2023-12-14,8.820095238095238,8.34
2023-12-15,8.74952380952381,8.37
2023-12-18,8.665904761904761,8.15
2023-12-19,8.590952380952382,8.16
2023-12-20,8.511666666666665,8.03
2023-12-21,8.461190476190474,8.25
2023-12-22,8.43057142857143,8.37
2023-12-25,8.416666666666666,8.47
2023-12-26,8.397904761904762,8.37
2023-12-27,8.385238095238094,8.39
2023-12-28,8.431952380952382,8.98
2023-12-29,8.466761904761903,8.86
2024-01-02,8.487380952380953,8.71
2024-01-03,8.503285714285715,8.66
2024-01-04,8.505761904761902,8.52
2024-01-05,8.497619047619047,8.4
2024-01-08,8.486285714285714,8.35
2024-01-09,8.487285714285715,8.46
2024-01-10,8.492238095238095,8.49
2024-01-11,8.516714285714286,8.69
2024-01-12,8.541380952380953,8.71
2024-01-15,8.56047619047619,8.67
2024-01-16,8.601952380952381,8.92
2024-01-17,8.616904761904761,8.68
2024-01-18,8.669380952380953,9.1
2024-01-19,8.721523809523811,9.15
2024-01-22,8.738904761904761,8.83
2024-01-23,8.790285714285716,9.21
2024-01-24,8.836238095238095,9.19
2024-01-25,8.870666666666667,9.11
2024-01-26,8.895,9.04
2024-01-29,8.827619047619047,8.08
2024-01-30,8.755380952380953,7.99
2024-01-31,8.681809523809525,7.94
2024-02-01,8.617380952380953,8.0
2024-02-02,8.548761904761903,7.93
2024-02-05,8.460476190476191,7.7
2024-02-06,8.41242857142857,8.09
2024-02-07,8.363285714285713,8.06
2024-02-08,8.336190476190476,8.27
2024-02-19,8.307285714285713,8.23
2024-02-20,8.270190476190475,8.12
2024-02-21,8.247142857142858,8.24
2024-02-22,8.239714285714287,8.37
2024-02-23,8.250904761904762,8.55

Answer: 19.0