import pandas as pd
import mplfinance as mpf
import matplotlib.animation as animation

mpf.__version__

idf = pd.read_csv('data/SPY_20110701_20120630_Bollinger.csv',index_col=0,parse_dates=True)
idf.shape
idf.head(3)
idf.tail(3)
df = idf.loc['2011-07-01':'2011-12-30',:]


# =======
#  MACD:

df = df.iloc[0:30]

exp12     = df['Close'].ewm(span=12, adjust=False).mean()
exp26     = df['Close'].ewm(span=26, adjust=False).mean()
macd      = exp12 - exp26
signal    = macd.ewm(span=9, adjust=False).mean()
histogram = macd - signal

apds = [mpf.make_addplot(exp12,color='lime'),
        mpf.make_addplot(exp26,color='c'),
        mpf.make_addplot(histogram,type='bar',width=0.7,panel=1,
                         color='dimgray',alpha=1,secondary_y=False),
        mpf.make_addplot(macd,panel=1,color='fuchsia',secondary_y=True),
        mpf.make_addplot(signal,panel=1,color='b',secondary_y=True),
       ]

s = mpf.make_mpf_style(base_mpf_style='classic',rc={'figure.facecolor':'lightgray'})

fig, axes = mpf.plot(df,type='candle',addplot=apds,figscale=1.5,figratio=(7,5),title='\n\nMACD',
                     style=s,volume=True,volume_panel=2,panel_ratios=(6,3,2),returnfig=True)

ax_main = axes[0]
ax_emav = ax_main
ax_hisg = axes[2]
ax_macd = axes[3]
ax_sign = ax_macd
ax_volu = axes[4]

df =  idf.loc['2011-07-01':'2011-12-30',:]

def animate(ival):
    if (20+ival) > len(df):
        print('no more data to plot')
        ani.event_source.interval *= 3
        if ani.event_source.interval > 12000:
            exit()
        return
    data = df.iloc[0:(30+ival)]
    exp12     = data['Close'].ewm(span=12, adjust=False).mean()
    exp26     = data['Close'].ewm(span=26, adjust=False).mean()
    macd      = exp12 - exp26
    signal    = macd.ewm(span=9, adjust=False).mean()
    histogram = macd - signal
    apds = [mpf.make_addplot(exp12,color='lime',ax=ax_emav),
            mpf.make_addplot(exp26,color='c',ax=ax_emav),
            mpf.make_addplot(histogram,type='bar',width=0.7,
                             color='dimgray',alpha=1,ax=ax_hisg),
            mpf.make_addplot(macd,color='fuchsia',ax=ax_macd),
            mpf.make_addplot(signal,color='b',ax=ax_sign),
           ]

    for ax in axes:
        ax.clear()
    mpf.plot(data,type='candle',addplot=apds,ax=ax_main,volume=ax_volu)

ani = animation.FuncAnimation(fig,animate,interval=100)

mpf.show()