qililiu

**Describe the bug** in "External Axes Method", the 'fill_between' function does not work. **To Reproduce** `import mplfinance as mpf idf = pd.read_csv('data/SPY_20110701_20120630_Bollinger.csv',index_col=0,parse_dates=True) fig = mpf.figure(style='yahoo',figsize=(7,8)) ax1 = fig.add_subplot(2,1,1) ax2 =...