Plotting horizontal lines (support and resistence)

[arturnawrot]

As the title says: is it possible to plot horizontal lines? Seems like docs don't mention anything about it, and I have seen _plotting.py and I don't think it would be possible.

[kernc]

You can plot a single line by way of vectors of all y s:

def init(self):
    support = 30000
    self.I(lambda: np.repeat(support, len(self.data)), name='support line')