'Flatten increase data and get increase text
:rtype (list, list, list): flat_increase_x: x-values for the increasing
trace, flat_increase_y: y=values for the increasing trace and
text_increase: hovertext for the increasing trace'

def get_increase(self):

    flat_increase_x = utils.flatten(self.increase_x)
    flat_increase_y = utils.flatten(self.increase_y)
    text_increase = (('Open', 'Open', 'High', 'Low', 'Close', 'Close', '') * len(self.increase_x))
    return (flat_increase_x, flat_increase_y, text_increase)
