Question: What is the value of the upper of Keltner Channel for Brown & Brown on June 18, 2024? (Standard parameters: middle EMA(20), requiring 4n data points to warm up, using the first data point as the initial value; ATR(10) using Wilder smoothing, multiplier 1.5) 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: Middle = EMA_{n_{ema}}(C); Upper = Middle + 1.5 * ATR_{n_{atr}}^{Wilder}; Lower = Middle - 1.5 * ATR_{n_{atr}}^{Wilder}
Data:
date,close,high,low
2024-02-23,84.23999786376953,84.5999984741211,83.91000366210938
2024-02-26,84.05000305175781,84.7300033569336,84.0199966430664
2024-02-27,84.11000061035156,84.22000122070312,83.13999938964844
2024-02-28,84.77999877929688,84.87000274658203,84.18000030517578
2024-02-29,84.20999908447266,84.83999633789062,83.77999877929688
2024-03-01,83.73999786376953,84.01000213623047,83.1500015258789
2024-03-04,83.94999694824219,84.13999938964844,83.19999694824219
2024-03-05,84.0999984741211,84.20999908447266,83.26000213623047
2024-03-06,85.11000061035156,85.20999908447266,84.05999755859375
2024-03-07,85.8499984741211,86.52999877929688,85.08999633789062
2024-03-08,85.19000244140625,86.02999877929688,84.83000183105469
2024-03-11,84.87999725341797,85.58999633789062,84.68000030517578
2024-03-12,85.9000015258789,86.22000122070312,84.80000305175781
2024-03-13,85.51000213623047,85.7699966430664,84.8499984741211
2024-03-14,84.98999786376953,85.83000183105469,84.51000213623047
2024-03-15,84.94000244140625,85.1500015258789,83.19000244140625
2024-03-18,85.01000213623047,85.48999786376953,84.91000366210938
2024-03-19,85.4800033569336,85.63999938964844,84.83999633789062
2024-03-20,86.69999694824219,87.0,85.54000091552734
2024-03-21,86.04000091552734,86.94999694824219,85.94999694824219
2024-03-22,86.0,86.66000366210938,85.93000030517578
2024-03-25,85.9000015258789,86.19000244140625,85.7300033569336
2024-03-26,86.41999816894531,86.54000091552734,85.58000183105469
2024-03-27,87.26000213623047,87.41999816894531,86.5
2024-03-28,87.54000091552734,87.98999786376953,87.19000244140625
2024-04-01,86.31999969482422,87.30999755859375,86.30000305175781
2024-04-02,85.51000213623047,86.9800033569336,85.33999633789062
2024-04-03,85.48999786376953,86.0999984741211,85.3499984741211
2024-04-04,83.94000244140625,86.06999969482422,83.7699966430664
2024-04-05,85.1500015258789,85.56999969482422,83.97000122070312
2024-04-08,85.51000213623047,86.04000091552734,84.91999816894531
2024-04-09,84.55999755859375,85.76000213623047,83.70999908447266
2024-04-10,83.5999984741211,84.30000305175781,83.43000030517578
2024-04-11,82.6500015258789,83.30000305175781,82.27999877929688
2024-04-12,81.9000015258789,83.05000305175781,81.58999633789062
2024-04-15,81.02999877929688,83.12999725341797,81.01000213623047
2024-04-16,80.91999816894531,81.69999694824219,80.9000015258789
2024-04-17,80.62000274658203,81.3499984741211,80.33000183105469
2024-04-18,81.12999725341797,81.86000061035156,80.88999938964844
2024-04-19,82.16999816894531,82.19000244140625,81.1500015258789
2024-04-22,82.5,83.20999908447266,82.33999633789062
2024-04-23,82.93000030517578,83.5,81.48999786376953
2024-04-24,82.12999725341797,82.87999725341797,81.69000244140625
2024-04-25,82.27999877929688,82.6500015258789,81.5
2024-04-26,81.45999908447266,82.1500015258789,80.87000274658203
2024-04-29,81.54000091552734,81.7699966430664,80.91000366210938
2024-04-30,81.54000091552734,82.12999725341797,81.06999969482422
2024-05-01,82.69999694824219,83.61000061035156,81.56999969482422
2024-05-02,82.8499984741211,83.20999908447266,82.27999877929688
2024-05-03,83.5,83.63999938964844,81.79000091552734
2024-05-06,84.20999908447266,84.47000122070312,83.5999984741211
2024-05-07,85.23999786376953,85.33000183105469,84.47000122070312
2024-05-08,84.80999755859375,85.81999969482422,84.76000213623047
2024-05-09,85.61000061035156,85.7300033569336,84.52999877929688
2024-05-10,87.06999969482422,87.43000030517578,85.88999938964844
2024-05-13,87.47000122070312,87.7699966430664,87.0199966430664
2024-05-14,88.44999694824219,88.51000213623047,87.06999969482422
2024-05-15,88.69999694824219,88.97000122070312,88.1500015258789
2024-05-16,89.4000015258789,89.9800033569336,88.98999786376953
2024-05-17,89.83000183105469,89.87000274658203,89.25
2024-05-20,89.86000061035156,89.91000366210938,89.33999633789062
2024-05-21,89.8499984741211,90.5,89.83999633789062
2024-05-22,91.16000366210938,91.6999969482422,89.9000015258789
2024-05-23,89.11000061035156,91.18000030517578,88.98999786376953
2024-05-24,89.36000061035156,89.51000213623047,89.04000091552734
2024-05-28,87.58000183105469,89.18000030517578,87.47000122070312
2024-05-29,86.31999969482422,87.19000244140625,86.2699966430664
2024-05-30,87.75,88.01000213623047,85.97000122070312
2024-05-31,89.51000213623047,89.6500015258789,87.87999725341797
2024-06-03,88.88999938964844,89.83999633789062,88.08999633789062
2024-06-04,89.9000015258789,89.98999786376953,88.66000366210938
2024-06-05,90.0,90.1500015258789,88.8499984741211
2024-06-06,89.52999877929688,90.47000122070312,88.87999725341797
2024-06-07,90.27999877929688,90.68000030517578,89.66000366210938
2024-06-10,89.63999938964844,90.41999816894533,89.18000030517578
2024-06-11,89.62000274658203,89.69000244140625,88.68000030517578
2024-06-12,90.47000122070312,90.69000244140624,89.0999984741211
2024-06-13,90.5199966430664,90.8000030517578,89.62000274658203
2024-06-14,90.08000183105467,90.5,89.73999786376953
2024-06-17,92.0,92.12000274658205,89.72000122070312
2024-06-18,92.41000366210938,93.0500030517578,91.87000274658205

Indicator data:
Answer: 91.7241