import matplotlib.pyplot as plt# prices = dates = buy_point = 3 sell_point = 8# fig, ax = plt.subplots()# ax.plot(dates, prices)# ax.annotate('Buy', xy=(dates , prices ), xytext=(dates , prices + 2), arrowprops=dict(facecolor='green', arrowstyle='->'))# ax.annotate('Sell', xy=(dates , prices ), xytext=(dates , prices - 2), ...