Question: How many break below events of the 20-day Hull Moving Average line occurred for Occidental Petroleum from July 18, 2025 to August 12, 2025? 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: HMA = WMA_{\sqrt{n}}(2 * WMA_{n/2}(P) - WMA_n(P))
Data:
date,close,high,open
2025-06-04,41.90999984741211,43.220001220703125,42.65999984741211
2025-06-05,41.81999969482422,42.31999969482422,42.27999877929688
2025-06-06,42.540000915527344,42.84000015258789,42.130001068115234
2025-06-09,43.2400016784668,43.630001068115234,43.0
2025-06-10,43.90999984741211,44.41999816894531,43.43999862670898
2025-06-11,44.84000015258789,44.970001220703125,44.369998931884766
2025-06-12,44.7599983215332,44.77000045776367,44.470001220703125
2025-06-13,46.45000076293945,46.63999938964844,46.560001373291016
2025-06-16,45.33000183105469,46.58000183105469,46.09000015258789
2025-06-17,45.97999954223633,46.709999084472656,45.97999954223633
2025-06-18,45.34999847412109,46.810001373291016,46.2599983215332
2025-06-20,45.630001068115234,45.900001525878906,45.560001373291016
2025-06-23,43.95000076293945,47.33000183105469,46.88999938964844
2025-06-24,42.47999954223633,43.54999923706055,42.630001068115234
2025-06-25,42.41999816894531,42.84000015258789,42.43000030517578
2025-06-26,43.15999984741211,43.2400016784668,42.5
2025-06-27,42.59999847412109,43.310001373291016,43.29999923706055
2025-06-30,42.0099983215332,42.43999862670898,42.38999938964844
2025-07-01,42.86000061035156,43.2400016784668,42.06999969482422
2025-07-02,43.93000030517578,44.02999877929688,43.43000030517578
2025-07-03,43.79999923706055,44.060001373291016,43.75
2025-07-07,43.34999847412109,44.16999816894531,43.5099983215332
2025-07-08,45.75,45.869998931884766,43.36000061035156
2025-07-09,45.56999969482422,45.84999847412109,45.58000183105469
2025-07-10,45.84999847412109,45.95000076293945,45.290000915527344
2025-07-11,46.310001373291016,46.43999862670898,45.68999862670898
2025-07-14,45.06999969482422,45.959999084472656,45.959999084472656
2025-07-15,42.68999862670898,45.13999938964844,44.93999862670898
2025-07-16,42.630001068115234,43.060001373291016,42.900001525878906
2025-07-17,43.54999923706055,43.619998931884766,42.58000183105469
2025-07-18,43.619998931884766,44.54999923706055,44.02999877929688
2025-07-21,43.0,43.900001525878906,43.75
2025-07-22,43.560001373291016,43.83000183105469,43.150001525878906
2025-07-23,44.43999862670898,44.47999954223633,43.77999877929688
2025-07-24,44.630001068115234,44.880001068115234,44.33000183105469
2025-07-25,44.709999084472656,44.9900016784668,44.66999816894531
2025-07-28,45.54999923706055,45.61000061035156,45.09999847412109
2025-07-29,45.459999084472656,45.63999938964844,45.41999816894531
2025-07-30,44.40999984741211,45.22999954223633,45.119998931884766
2025-07-31,43.93999862670898,44.79999923706055,43.91999816894531
2025-08-01,43.40999984741211,43.72999954223633,43.59000015258789
2025-08-04,42.86000061035156,43.4900016784668,42.84000015258789
2025-08-05,43.08000183105469,43.130001068115234,42.9900016784668
2025-08-06,42.540000915527344,43.83000183105469,43.310001373291016
2025-08-07,43.59000015258789,45.130001068115234,43.900001525878906
2025-08-08,44.31999969482422,44.86000061035156,43.709999084472656
2025-08-11,43.709999084472656,44.45000076293945,44.34999847412109
2025-08-12,44.150001525878906,44.7400016784668,43.869998931884766

Indicator data:
date,20-day,close
2025-07-08,42.90953123216505,45.75
2025-07-09,43.461630860035555,45.56999969482422
2025-07-10,44.1150680717039,45.84999847412109
2025-07-11,44.81759902937587,46.310001373291016
2025-07-14,45.331306997026715,45.06999969482422
2025-07-15,45.42103817927373,42.68999862670898
2025-07-16,45.181861701569005,42.630001068115234
2025-07-17,44.83257557063907,43.54999923706055
2025-07-18,44.47997291251178,43.619998931884766
2025-07-21,44.10905387184837,43.0
2025-07-22,43.77635792802422,43.560001373291016
2025-07-23,43.58288519508394,44.43999862670898
2025-07-24,43.53746281083012,44.630001068115234
2025-07-25,43.63085454800428,44.709999084472656
2025-07-28,43.915241880045315,45.54999923706055
2025-07-29,44.301323125764924,45.459999084472656
2025-07-30,44.59852821432666,44.40999984741211
2025-07-31,44.7360899635414,43.93999862670898
2025-08-01,44.6800699815296,43.40999984741211
2025-08-04,44.44708822886149,42.86000061035156
2025-08-05,44.14665041737743,43.08000183105469
2025-08-06,43.7646698110341,42.540000915527344
2025-08-07,43.47339991879154,43.59000015258789
2025-08-08,43.35041040957232,44.31999969482422
2025-08-11,43.28398651734059,43.709999084472656
2025-08-12,43.319514300689036,44.150001525878906

Answer: 2.0