title: mplfinance freezes IPython console
body: <p>I'm trying to create a candlestick plot using mplfinance but whenever I run mplfinance.plot() the IPython console in Spyder freezes like it's working on something but it never finishes running nor does it respond to ^C.</p>
  
  <pre><code>import ta
  import yfinance as yf
  import mplfinance as mpf
  
  naftrac = yf.Ticker("NAFTRACISHRS.MX")
  
  # get historical market data
  hist = naftrac.history(period = "1y", interval = "1wk", actions = False)
  hist = hist.dropna()
  
  mpf.plot(hist, type = "candle", volume = True)
  </code></pre>
  
  <p>I'm using the standard 3.7.4 python anaconda install, with pandas 1.0.3, matplotlib 3.2.1, and IPython 7.8.0. My mplfinance version is 0.12.4a0.</p>
  
  <p>Anyone else faced the same issue? How do you fix this? </p>