Question: What is the value of MACD Histogram for Cigna on March 21, 2022? (Standard parameters: fast 12, slow 26, signal 9; Require 104 data points to warm up; EMA uses 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: MACD Histogram = MACD Line - Signal Line; MACD Line = EMA_{n_{fast}}(P) - EMA_{n_{slow}}(P); Signal Line = EMA_{n_{signal}}(MACD Line)
Data:
date,close
2021-10-20,214.75999450683597
2021-10-21,216.22999572753903
2021-10-22,216.3999938964844
2021-10-25,215.6199951171875
2021-10-26,215.6699981689453
2021-10-27,213.3999938964844
2021-10-28,215.75
2021-10-29,213.6100006103516
2021-11-01,216.1300048828125
2021-11-02,214.7100067138672
2021-11-03,218.25
2021-11-04,213.16000366210935
2021-11-05,214.1199951171875
2021-11-08,218.16000366210935
2021-11-09,216.1999969482422
2021-11-10,217.83999633789065
2021-11-11,217.6999969482422
2021-11-12,217.72999572753903
2021-11-15,215.52999877929688
2021-11-16,217.75999450683597
2021-11-17,216.97999572753903
2021-11-18,218.75
2021-11-19,210.50999450683597
2021-11-22,211.5500030517578
2021-11-23,213.2400054931641
2021-11-24,210.5800018310547
2021-11-26,202.02999877929688
2021-11-29,199.6100006103516
2021-11-30,191.8999938964844
2021-12-01,194.72000122070312
2021-12-02,197.7899932861328
2021-12-03,199.8600006103516
2021-12-06,206.58999633789065
2021-12-07,207.97000122070312
2021-12-08,208.30999755859372
2021-12-09,211.3000030517578
2021-12-10,214.94000244140625
2021-12-13,215.1499938964844
2021-12-14,216.6199951171875
2021-12-15,217.4600067138672
2021-12-16,218.6699981689453
2021-12-17,219.6199951171875
2021-12-20,217.0
2021-12-21,220.2400054931641
2021-12-22,222.3300018310547
2021-12-23,225.88999938964844
2021-12-27,227.8600006103516
2021-12-28,230.5399932861328
2021-12-29,231.6499938964844
2021-12-30,230.75
2021-12-31,229.6300048828125
2022-01-03,234.1999969482422
2022-01-04,233.3000030517578
2022-01-05,236.5200042724609
2022-01-06,227.5399932861328
2022-01-07,233.17999267578125
2022-01-10,233.69000244140625
2022-01-11,240.13999938964844
2022-01-12,238.77999877929688
2022-01-13,240.5500030517578
2022-01-14,242.1699981689453
2022-01-18,239.97999572753903
2022-01-19,238.8000030517578
2022-01-20,240.38999938964844
2022-01-21,236.25
2022-01-24,236.4199981689453
2022-01-25,234.7400054931641
2022-01-26,234.0200042724609
2022-01-27,227.42999267578125
2022-01-28,233.4499969482422
2022-01-31,230.4600067138672
2022-02-01,225.91000366210935
2022-02-02,230.0200042724609
2022-02-03,217.55999755859372
2022-02-04,221.3699951171875
2022-02-07,224.47999572753903
2022-02-08,231.7700042724609
2022-02-09,232.3800048828125
2022-02-10,230.2700042724609
2022-02-11,227.5
2022-02-14,225.2400054931641
2022-02-15,228.41000366210935
2022-02-16,229.0
2022-02-17,227.1100006103516
2022-02-18,228.6499938964844
2022-02-22,227.72999572753903
2022-02-23,225.08999633789065
2022-02-24,224.42999267578125
2022-02-25,232.83999633789065
2022-02-28,237.77999877929688
2022-03-01,237.1000061035156
2022-03-02,240.50999450683597
2022-03-03,237.80999755859372
2022-03-04,241.6300048828125
2022-03-07,237.8500061035156
2022-03-08,229.1000061035156
2022-03-09,231.25999450683597
2022-03-10,229.4600067138672
2022-03-11,226.8600006103516
2022-03-14,226.1999969482422
2022-03-15,233.0800018310547
2022-03-16,237.5
2022-03-17,242.38999938964844
2022-03-18,241.16000366210935
2022-03-21,243.50999450683597

Indicator data:
Answer: 1.0551