# get series ordered by volume in a descending way
series = holdout_df.groupby('unique_id')['target'].sum().reset_index().sort_values(by='target', ascending=False)['unique_id'].tolist()

timegpt.plot(
    forecast_df[['unique_id', 'delivery_week', 'target']], 
    timegpt_fcst_ex_vars_df,
    time_col='delivery_week',
    target_col='target',
    unique_ids=series[:6],
    level=[80], 
)