import numpy as np
from bokeh.plotting import figure, output_notebook, show
output_notebook()
# define Bollinger bands
upperband = np.random.randint(100, 150, size=100)
lowerband = upperband - 100
x_data = np.arange(1, 101)
# shading glyph for Bollinger bands
band_x = np.append(x_data, x_data[::-1])
band_y = np.append(lowerband, upperband[::-1])
p = figure(x_axis_type='datetime', title = 'Bollinger Bands')
p.x_range.range_padding = 0
p.plot_height = 600
p.plot_width = 800
p.grid.grid_line_alpha = 0.4
p.patch(band_x, band_y, color='#7570B3', fill_alpha=0.2)
show(p)