Question: On October 01, 2021, what is the 20-day Triple Exponential Moving Average close price of Charles Schwab Corporation? (Unit: USD) (Smoothing factor alpha = 2 / (n + 1); Require 6n data points to warm up; Use the first data point as the initial value) Using unadjusted prices, write down the indicator formula, collect the raw data, calculate the answer, and keep four decimal places. Please list the raw data and key calculation process.
Formula: TEMA = 3 * EMA1 - 3 * EMA2 + EMA3; EMA1 = EMA_n(P); EMA2 = EMA_n(EMA1); EMA3 = EMA_n(EMA2)
Data:
date,close
2021-04-13,66.5999984741211
2021-04-14,67.44000244140625
2021-04-15,65.5
2021-04-16,64.73999786376953
2021-04-19,65.87999725341797
2021-04-20,63.68999862670898
2021-04-21,65.4000015258789
2021-04-22,64.80000305175781
2021-04-23,67.13999938964844
2021-04-26,67.7699966430664
2021-04-27,69.63999938964844
2021-04-28,69.86000061035156
2021-04-29,71.70999908447266
2021-04-30,70.4000015258789
2021-05-03,70.94000244140625
2021-05-04,70.08999633789062
2021-05-05,70.9800033569336
2021-05-06,71.5199966430664
2021-05-07,71.75
2021-05-10,71.0999984741211
2021-05-11,70.62999725341797
2021-05-12,69.12000274658203
2021-05-13,70.43000030517578
2021-05-14,73.25
2021-05-17,73.0
2021-05-18,70.9000015258789
2021-05-19,71.20999908447266
2021-05-20,70.73999786376953
2021-05-21,72.16999816894531
2021-05-24,72.61000061035156
2021-05-25,71.62999725341797
2021-05-26,71.52999877929688
2021-05-27,73.8499984741211
2021-05-28,73.8499984741211
2021-06-01,74.63999938964844
2021-06-02,74.93000030517578
2021-06-03,76.01000213623047
2021-06-04,75.72000122070312
2021-06-07,74.7300033569336
2021-06-08,75.12000274658203
2021-06-09,72.8499984741211
2021-06-10,72.62000274658203
2021-06-11,73.91999816894531
2021-06-14,72.01000213623047
2021-06-15,72.54000091552734
2021-06-16,73.75
2021-06-17,72.13999938964844
2021-06-18,69.83000183105469
2021-06-21,72.73999786376953
2021-06-22,72.5
2021-06-23,72.88999938964844
2021-06-24,73.38999938964844
2021-06-25,73.77999877929688
2021-06-28,73.27999877929688
2021-06-29,73.22000122070312
2021-06-30,72.80999755859375
2021-07-01,73.56999969482422
2021-07-02,72.80000305175781
2021-07-06,70.7699966430664
2021-07-07,70.06999969482422
2021-07-08,67.94000244140625
2021-07-09,70.55000305175781
2021-07-12,71.70999908447266
2021-07-13,71.81999969482422
2021-07-14,70.19999694824219
2021-07-15,70.55000305175781
2021-07-16,68.88999938964844
2021-07-19,66.68000030517578
2021-07-20,67.94000244140625
2021-07-21,69.55999755859375
2021-07-22,67.25
2021-07-23,67.91000366210938
2021-07-26,68.04000091552734
2021-07-27,67.37000274658203
2021-07-28,67.8499984741211
2021-07-29,68.56999969482422
2021-07-30,67.94999694824219
2021-08-02,67.73999786376953
2021-08-03,67.41000366210938
2021-08-04,67.66999816894531
2021-08-05,69.30000305175781
2021-08-06,71.93000030517578
2021-08-09,73.41999816894531
2021-08-10,74.52999877929688
2021-08-11,74.80999755859375
2021-08-12,75.41999816894531
2021-08-13,74.01000213623047
2021-08-16,73.26000213623047
2021-08-17,72.5
2021-08-18,72.0
2021-08-19,71.05999755859375
2021-08-20,71.97000122070312
2021-08-23,72.30000305175781
2021-08-24,74.1500015258789
2021-08-25,74.58000183105469
2021-08-26,73.6500015258789
2021-08-27,75.83999633789062
2021-08-30,73.44000244140625
2021-08-31,72.8499984741211
2021-09-01,73.19999694824219
2021-09-02,72.91000366210938
2021-09-03,72.08999633789062
2021-09-07,72.08000183105469
2021-09-08,71.55999755859375
2021-09-09,72.33000183105469
2021-09-10,71.44000244140625
2021-09-13,71.88999938964844
2021-09-14,69.7300033569336
2021-09-15,71.1500015258789
2021-09-16,70.77999877929688
2021-09-17,70.43000030517578
2021-09-20,68.80000305175781
2021-09-21,68.44000244140625
2021-09-22,70.4000015258789
2021-09-23,74.30000305175781
2021-09-24,75.58999633789062
2021-09-27,77.37999725341797
2021-09-28,76.18000030517578
2021-09-29,75.37999725341797
2021-09-30,72.83999633789062
2021-10-01,74.41999816894531

Indicator data:
Answer: 74.5085