"""freq=H: Calculates the returns of each row relative to 1 row(s) before."""
daily_data2016to2018_df.pct_change(freq='H').head()

"""freq=4H: Calculates the returns of each row relative to 4 row(s) before."""
daily_data2016to2018_df.pct_change(freq='4H').head(10)

"""freq=D: Calculates the returns of each row relative to 24 row(s) before."""
daily_data2016to2018_df.pct_change(freq='D').head(30)

"""freq=W: Calculates the returns of each row relative to 24*7 row(s) before."""
daily_data2016to2018_df.pct_change(freq='W').head(30)

"""I don't understand why frequencies greater than a day aren't working.
I could see why frequencies less than an hour wouldn't work because
the data isn't that granular, but why not weekly, monthly, etc.?"""
daily_data2016to2018_df.pct_change(freq='M')