Question: 宝钢股份2021年07月20日至2022年04月01日, 价格突破10日指数移动平均线有多少次？（平滑系数 alpha 取 2 / (n + 1)；从前 4n 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: EMA_t = \alpha * P_t + (1 - \alpha) * EMA_{t-1}，\alpha = 2 / (n + 1)
Data:
date,close,low,high,open
2021-05-24,7.73,7.57,7.83,7.77
2021-05-25,7.74,7.55,7.77,7.73
2021-05-26,7.76,7.61,7.8,7.64
2021-05-27,7.87,7.72,7.93,7.78
2021-05-28,7.86,7.81,8.06,8.0
2021-05-31,7.88,7.78,7.92,7.9
2021-06-01,7.95,7.59,7.97,7.78
2021-06-02,7.78,7.76,7.97,7.89
2021-06-03,7.84,7.79,7.98,7.82
2021-06-04,7.9,7.76,8.0,7.81
2021-06-07,7.73,7.69,7.89,7.88
2021-06-08,7.88,7.69,7.95,7.7
2021-06-09,7.94,7.85,8.04,7.88
2021-06-10,7.94,7.91,8.08,8.02
2021-06-11,8.02,7.9,8.07,8.0
2021-06-15,7.78,7.7,8.01,8.01
2021-06-16,7.69,7.65,7.95,7.76
2021-06-17,7.35,7.28,7.7,7.69
2021-06-18,7.0,6.93,7.16,7.04
2021-06-21,7.13,7.05,7.17,7.08
2021-06-22,7.15,7.01,7.2,7.1
2021-06-23,7.49,7.1,7.59,7.14
2021-06-24,7.64,7.41,7.69,7.49
2021-06-25,7.67,7.55,7.75,7.67
2021-06-28,7.65,7.53,7.68,7.66
2021-06-29,7.57,7.54,7.66,7.63
2021-06-30,7.64,7.57,7.71,7.63
2021-07-01,7.73,7.56,7.78,7.67
2021-07-02,7.63,7.48,7.71,7.61
2021-07-05,7.5,7.33,7.66,7.61
2021-07-06,7.45,7.41,7.68,7.53
2021-07-07,7.59,7.41,7.61,7.46
2021-07-08,7.58,7.5,7.68,7.65
2021-07-09,7.7,7.51,7.77,7.54
2021-07-12,7.65,7.58,7.93,7.75
2021-07-13,7.64,7.56,7.7,7.65
2021-07-14,7.51,7.51,7.74,7.64
2021-07-15,8.05,7.51,8.12,7.57
2021-07-16,7.98,7.93,8.22,8.06
2021-07-19,7.86,7.81,8.18,8.07
2021-07-20,7.62,7.5,7.74,7.73
2021-07-21,7.66,7.54,7.73,7.69
2021-07-22,8.06,7.59,8.13,7.61
2021-07-23,8.09,8.08,8.39,8.18
2021-07-26,7.76,7.68,8.18,8.13
2021-07-27,7.37,7.36,7.9,7.8
2021-07-28,7.17,7.03,7.35,7.3
2021-07-29,7.23,7.06,7.29,7.28
2021-07-30,7.92,7.19,7.95,7.23
2021-08-02,7.3,7.15,7.63,7.6
2021-08-03,7.16,7.11,7.29,7.19
2021-08-04,7.38,7.19,7.5,7.21
2021-08-05,7.35,7.24,7.43,7.34
2021-08-06,7.46,7.3,7.56,7.32
2021-08-09,7.75,7.4,7.78,7.42
2021-08-10,7.93,7.67,7.96,7.81
2021-08-11,8.05,7.86,8.11,8.02
2021-08-12,8.29,7.98,8.58,8.04
2021-08-13,8.25,8.15,8.37,8.16
2021-08-16,8.47,8.19,8.57,8.27
2021-08-17,8.3,8.19,8.52,8.43
2021-08-18,8.36,8.23,8.51,8.29
2021-08-19,8.41,8.04,8.47,8.19
2021-08-20,8.39,8.18,8.49,8.3
2021-08-23,8.33,8.26,8.51,8.43
2021-08-24,8.4,8.3,8.68,8.36
2021-08-25,8.53,8.3,8.55,8.42
2021-08-26,8.93,8.5,9.12,8.54
2021-08-27,9.1,8.82,9.2,8.82
2021-08-30,9.64,9.37,9.75,9.4
2021-08-31,10.19,9.66,10.31,9.67
2021-09-01,10.25,9.98,10.55,10.2
2021-09-02,10.4,9.98,10.54,10.21
2021-09-03,10.05,9.89,10.35,10.32
2021-09-06,10.24,10.04,10.38,10.05
2021-09-07,10.84,10.11,10.93,10.17
2021-09-08,10.53,10.43,10.8,10.69
2021-09-09,11.42,10.51,11.57,10.51
2021-09-10,11.24,11.03,11.44,11.28
2021-09-13,11.84,11.15,12.07,11.15
2021-09-14,11.04,10.96,11.72,11.72
2021-09-15,11.03,10.83,11.36,10.97
2021-09-16,11.01,10.94,11.52,11.22
2021-09-17,10.45,10.11,11.15,10.92
2021-09-22,10.46,9.98,10.48,10.28
2021-09-23,10.35,10.09,10.62,10.46
2021-09-24,9.61,9.52,10.36,10.18
2021-09-27,9.25,9.2,9.67,9.61
2021-09-28,9.23,9.07,9.45,9.33
2021-09-29,8.61,8.52,9.23,9.2
2021-09-30,8.7,8.56,8.78,8.69
2021-10-08,8.62,8.49,8.85,8.85
2021-10-11,8.39,8.21,8.65,8.65
2021-10-12,8.04,7.91,8.5,8.42
2021-10-13,8.07,7.88,8.14,8.05
2021-10-14,8.04,7.97,8.22,8.02
2021-10-15,7.77,7.66,7.89,7.8
2021-10-18,7.82,7.67,7.88,7.75
2021-10-19,7.88,7.68,7.9,7.8
2021-10-20,7.8,7.5,7.86,7.8
2021-10-21,7.69,7.67,7.94,7.86
2021-10-22,7.44,7.37,7.72,7.61
2021-10-25,7.46,7.23,7.5,7.44
2021-10-26,7.41,7.35,7.55,7.47
2021-10-27,7.22,7.18,7.46,7.42
2021-10-28,7.07,6.95,7.25,7.25
2021-10-29,7.13,7.05,7.19,7.12
2021-11-01,7.01,6.98,7.14,7.14
2021-11-02,6.76,6.63,7.03,7.0
2021-11-03,6.85,6.67,6.89,6.77
2021-11-04,6.71,6.66,6.84,6.84
2021-11-05,6.41,6.38,6.63,6.61
2021-11-08,6.41,6.39,6.56,6.45
2021-11-09,6.31,6.27,6.44,6.43
2021-11-10,6.37,6.14,6.41,6.26
2021-11-11,6.57,6.39,6.7,6.4
2021-11-12,6.37,6.35,6.59,6.57
2021-11-15,6.5,6.27,6.51,6.36
2021-11-16,6.32,6.31,6.6,6.5
2021-11-17,6.46,6.28,6.47,6.3
2021-11-18,6.42,6.39,6.51,6.43
2021-11-19,6.53,6.32,6.56,6.4
2021-11-22,6.43,6.42,6.55,6.53
2021-11-23,6.59,6.49,6.78,6.49
2021-11-24,6.78,6.56,6.81,6.65
2021-11-25,6.72,6.69,6.81,6.8
2021-11-26,6.77,6.61,6.93,6.66
2021-11-29,6.66,6.51,6.7,6.65
2021-11-30,6.52,6.48,6.7,6.62
2021-12-01,6.77,6.48,6.77,6.54
2021-12-02,6.99,6.71,7.04,6.73
2021-12-03,7.01,6.87,7.05,6.99
2021-12-06,7.01,7.0,7.27,7.05
2021-12-07,7.23,6.95,7.24,7.09
2021-12-08,7.18,7.08,7.23,7.19
2021-12-09,7.11,7.07,7.19,7.17
2021-12-10,7.01,6.93,7.13,7.11
2021-12-13,7.08,7.03,7.17,7.05
2021-12-14,6.96,6.95,7.1,7.04
2021-12-15,7.0,6.94,7.06,6.96
2021-12-16,7.47,7.01,7.51,7.01
2021-12-17,7.49,7.42,7.62,7.49
2021-12-20,7.24,7.21,7.53,7.46
2021-12-21,7.48,7.18,7.5,7.27
2021-12-22,7.34,7.28,7.49,7.48
2021-12-23,7.38,7.3,7.39,7.33
2021-12-24,7.26,7.24,7.41,7.37
2021-12-27,7.24,7.1,7.26,7.19
2021-12-28,7.16,7.11,7.23,7.21
2021-12-29,7.13,7.11,7.21,7.13
2021-12-30,7.11,7.08,7.19,7.15
2021-12-31,7.16,7.07,7.2,7.09
2022-01-04,7.23,7.12,7.3,7.14
2022-01-05,7.16,7.13,7.3,7.27
2022-01-06,7.4,7.13,7.45,7.16
2022-01-07,7.62,7.34,7.7,7.36
2022-01-10,7.6,7.51,7.74,7.69
2022-01-11,7.65,7.56,7.78,7.58
2022-01-12,7.51,7.37,7.61,7.61
2022-01-13,7.46,7.43,7.64,7.51
2022-01-14,7.26,7.24,7.46,7.43
2022-01-17,7.32,7.18,7.35,7.22
2022-01-18,7.56,7.25,7.57,7.29
2022-01-19,7.7,7.55,7.73,7.61
2022-01-20,7.77,7.63,7.85,7.66
2022-01-21,7.5,7.46,7.73,7.71
2022-01-24,7.56,7.36,7.61,7.44
2022-01-25,7.23,7.21,7.54,7.53
2022-01-26,7.27,7.15,7.39,7.24
2022-01-27,7.23,7.17,7.35,7.22
2022-01-28,7.04,6.93,7.29,7.29
2022-02-07,7.29,7.05,7.39,7.05
2022-02-08,7.62,7.27,7.64,7.33
2022-02-09,7.62,7.51,7.66,7.6
2022-02-10,7.7,7.52,7.75,7.58
2022-02-11,7.67,7.64,7.92,7.7
2022-02-14,7.36,7.31,7.64,7.61
2022-02-15,7.28,7.21,7.39,7.34
2022-02-16,7.46,7.29,7.55,7.3
2022-02-17,7.39,7.36,7.53,7.46
2022-02-18,7.61,7.31,7.64,7.34
2022-02-21,7.53,7.45,7.65,7.62
2022-02-22,7.39,7.32,7.51,7.46
2022-02-23,7.35,7.28,7.42,7.36
2022-02-24,7.12,7.01,7.31,7.3
2022-02-25,7.17,7.11,7.32,7.12
2022-02-28,7.22,7.07,7.23,7.19
2022-03-01,7.29,7.2,7.42,7.25
2022-03-02,7.27,7.22,7.43,7.26
2022-03-03,7.5,7.28,7.51,7.34
2022-03-04,7.45,7.33,7.57,7.46
2022-03-07,7.41,7.38,7.63,7.52
2022-03-08,7.25,7.18,7.45,7.43
2022-03-09,7.13,6.8,7.28,7.26
2022-03-10,7.08,7.07,7.22,7.18
2022-03-11,6.91,6.75,7.03,7.03
2022-03-14,6.71,6.71,6.93,6.8
2022-03-15,6.18,6.17,6.68,6.68
2022-03-16,6.34,6.02,6.4,6.22
2022-03-17,6.65,6.39,6.74,6.43
2022-03-18,6.68,6.58,6.73,6.65
2022-03-21,6.63,6.56,6.75,6.74
2022-03-22,6.73,6.6,6.76,6.64
2022-03-23,6.66,6.58,6.74,6.7
2022-03-24,6.68,6.63,6.75,6.68
2022-03-25,6.61,6.6,6.7,6.69
2022-03-28,6.7,6.45,6.76,6.56
2022-03-29,6.62,6.6,6.71,6.67
2022-03-30,6.73,6.58,6.73,6.64
2022-03-31,6.75,6.68,6.83,6.69
2022-04-01,6.87,6.69,6.88,6.72

Indicator data:
date,10日,close
2021-06-04,7.83549439845907,7.9
2021-06-07,7.816313598739239,7.73
2021-06-08,7.827892944423013,7.88
2021-06-09,7.848276045437011,7.94
2021-06-10,7.864953128084826,7.94
2021-06-11,7.893143468433039,8.02
2021-06-15,7.8725719287179405,7.78
2021-06-16,7.8393770325874055,7.69
2021-06-17,7.750399390298785,7.35
2021-06-18,7.613963137517187,7.0
2021-06-21,7.525969839786789,7.13
2021-06-22,7.457611687098281,7.15
2021-06-23,7.463500471262229,7.49
2021-06-24,7.4955912946690955,7.64
2021-06-25,7.527301968365623,7.67
2021-06-28,7.549610701390055,7.65
2021-06-29,7.553317846591863,7.57
2021-06-30,7.569078238120614,7.64
2021-07-01,7.5983367402805015,7.73
2021-07-02,7.604093696593138,7.63
2021-07-05,7.5851675699398395,7.5
2021-07-06,7.560591648132595,7.45
2021-07-07,7.565938621199395,7.59
2021-07-08,7.568495235526777,7.58
2021-07-09,7.592405192703727,7.7
2021-07-12,7.602876975848504,7.65
2021-07-13,7.609626616603322,7.64
2021-07-14,7.591512686311808,7.51
2021-07-15,7.674874016073297,8.05
2021-07-16,7.730351467696334,7.98
2021-07-19,7.7539239281151815,7.86
2021-07-20,7.72957412300333,7.62
2021-07-21,7.716924282457269,7.66
2021-07-22,7.779301685646856,8.06
2021-07-23,7.835792288256518,8.09
2021-07-26,7.822011872209878,7.76
2021-07-27,7.739827895444446,7.37
2021-07-28,7.636222823545455,7.17
2021-07-29,7.562364128355371,7.23
2021-07-30,7.627388832290757,7.92
2021-08-02,7.567863590056073,7.3
2021-08-03,7.493706573682242,7.16
2021-08-04,7.473032651194561,7.38
2021-08-05,7.450663078250095,7.35
2021-08-06,7.452360700386441,7.46
2021-08-09,7.506476936679815,7.75
2021-08-10,7.583481130010757,7.93
2021-08-11,7.668302742736073,8.05
2021-08-12,7.78133860769315,8.29
2021-08-13,7.866549769930758,8.25
2021-08-16,7.976267993579711,8.47
2021-08-17,8.0351283583834,8.3
2021-08-18,8.094195929586418,8.36
2021-08-19,8.151614851479795,8.41
2021-08-20,8.194957605756196,8.39
2021-08-23,8.219510768345978,8.33
2021-08-24,8.252326992283074,8.4
2021-08-25,8.30281299368615,8.53
2021-08-26,8.416846994834122,8.93
2021-08-27,8.541056632137009,9.1
2021-08-30,8.740864517203008,9.64
2021-08-31,9.00434369589337,10.19
2021-09-01,9.230826660276394,10.25
2021-09-02,9.443403631135231,10.4
2021-09-03,9.553693880019734,10.05
2021-09-06,9.678476810925236,10.24
2021-09-07,9.889662845302466,10.84
2021-09-08,10.006087782520199,10.53
2021-09-09,10.263162731152889,11.42
2021-09-10,10.440769507306907,11.24
2021-09-13,10.695175051432923,11.84
2021-09-14,10.757870496626937,11.04
2021-09-15,10.807348588149312,11.03
2021-09-16,10.844194299394891,11.01
2021-09-17,10.77252260859582,10.45
2021-09-22,10.715700316123852,10.46
2021-09-23,10.649209349555878,10.35
2021-09-24,10.460262195091174,9.61
2021-09-27,10.240214523256414,9.25
2021-09-28,10.05653915539161,9.23
2021-09-29,9.793532036229497,8.61
2021-09-30,9.594708029642314,8.7
2021-10-08,9.417488387889165,8.62
2021-10-11,9.230672317363862,8.39
2021-10-12,9.014186441479522,8.04
2021-10-13,8.842516179392335,8.07
2021-10-14,8.696604146775547,8.04
2021-10-15,8.528130665543628,7.77
2021-10-18,8.399379635444786,7.82
2021-10-19,8.304946974454825,7.88
2021-10-20,8.213138433644858,7.8
2021-10-21,8.118022354800337,7.69
2021-10-22,7.994745563018457,7.44
2021-10-25,7.897519097015101,7.46
2021-10-26,7.808879261194173,7.41
2021-10-27,7.701810304613414,7.22
2021-10-28,7.586935703774611,7.07
2021-10-29,7.5038564849065,7.13
2021-11-01,7.414064396741681,7.01
2021-11-02,7.295143597334102,6.76
2021-11-03,7.21420839781881,6.85
2021-11-04,7.1225341436699345,6.71
2021-11-05,6.992982481184491,6.41
2021-11-08,6.886985666423675,6.41
2021-11-09,6.78207918161937,6.31
2021-11-10,6.7071556940522115,6.37
2021-11-11,6.682218295133627,6.57
2021-11-12,6.625451332382058,6.37
2021-11-15,6.602641999221683,6.5
2021-11-16,6.551252544817741,6.32
2021-11-17,6.534661173032697,6.46
2021-11-18,6.513813687026752,6.42
2021-11-19,6.516756653021887,6.53
2021-11-22,6.500982716108816,6.43
2021-11-23,6.517167676816304,6.59
2021-11-24,6.564955371940613,6.78
2021-11-25,6.593145304315047,6.72
2021-11-26,6.625300703530492,6.77
2021-11-29,6.631609666524947,6.66
2021-11-30,6.611316999884047,6.52
2021-12-01,6.640168454450583,6.77
2021-12-02,6.7037741900050225,6.99
2021-12-03,6.759451610004109,7.01
2021-12-06,6.805005862730634,7.01
2021-12-07,6.882277524052337,7.23
2021-12-08,6.936408883315548,7.18
2021-12-09,6.967970904530903,7.11
2021-12-10,6.975612558252556,7.01
2021-12-13,6.9945920931157275,7.08
2021-12-14,6.98830262164014,6.96
2021-12-15,6.990429417705569,7.0
2021-12-16,7.077624069031828,7.47
2021-12-17,7.152601511026042,7.49
2021-12-20,7.168492145384943,7.24
2021-12-21,7.225129937133135,7.48
2021-12-22,7.246015403108927,7.34
2021-12-23,7.2703762389073034,7.38
2021-12-24,7.268489650015066,7.26
2021-12-27,7.26330971364869,7.24
2021-12-28,7.244526129348928,7.16
2021-12-29,7.223703196740031,7.13
2021-12-30,7.2030298882418435,7.11
2021-12-31,7.195206272197871,7.16
2022-01-04,7.201532404525531,7.23
2022-01-05,7.193981058248161,7.16
2022-01-06,7.231439047657586,7.4
2022-01-07,7.302086493538025,7.62
2022-01-10,7.35625258562202,7.6
2022-01-11,7.409661206418017,7.65
2022-01-12,7.427904623432922,7.51
2022-01-13,7.433740146445118,7.46
2022-01-14,7.402151028909642,7.26
2022-01-17,7.387214478198797,7.32
2022-01-18,7.418630027617198,7.56
2022-01-19,7.469788204414071,7.7
2022-01-20,7.524372167247876,7.77
2022-01-21,7.5199408641118985,7.5
2022-01-24,7.52722434336428,7.56
2022-01-25,7.473183553661682,7.23
2022-01-26,7.436241089359557,7.27
2022-01-27,7.398742709476001,7.23
2022-01-28,7.333516762298546,7.04
2022-02-07,7.32560462369881,7.29
2022-02-08,7.379131055753572,7.62
2022-02-09,7.422925409252922,7.62
2022-02-10,7.473302607570573,7.7
2022-02-11,7.509065769830468,7.67
2022-02-14,7.481962902588565,7.36
2022-02-15,7.44524237484519,7.28
2022-02-16,7.447925579418792,7.46
2022-02-17,7.437393655888102,7.39
2022-02-18,7.468776627544811,7.61
2022-02-21,7.479908149809391,7.53
2022-02-22,7.463561213480411,7.39
2022-02-23,7.442913720120336,7.35
2022-02-24,7.384202134643911,7.12
2022-02-25,7.345256291981381,7.17
2022-02-28,7.3224824207120385,7.22
2022-03-01,7.316576526037122,7.29
2022-03-02,7.3081080667576455,7.27
2022-03-03,7.342997509165347,7.5
2022-03-04,7.3624525074989196,7.45
2022-03-07,7.371097506135479,7.41
2022-03-08,7.349079777747209,7.25
2022-03-09,7.30924709088408,7.13
2022-03-10,7.267565801632428,7.08
2022-03-11,7.202553837699259,6.91
2022-03-14,7.112998594481211,6.71
2022-03-15,6.943362486393717,6.18
2022-03-16,6.833660216140313,6.34
2022-03-17,6.800267449569346,6.65
2022-03-18,6.778400640556738,6.68
2022-03-21,6.7514187059100585,6.63
2022-03-22,6.747524395744593,6.73
2022-03-23,6.731610869245576,6.66
2022-03-24,6.722227074837289,6.68
2022-03-25,6.7018221521396,6.61
2022-03-28,6.701490851750583,6.7
2022-03-29,6.686674333250476,6.62
2022-03-30,6.694551727204934,6.73
2022-03-31,6.704633231349492,6.75
2022-04-01,6.734699916558674,6.87

Answer: 20.0