diff --git a/freqtrade/analyze.py b/freqtrade/analyze.py
index 1a9a285fa..32bce45e0 100644
--- a/freqtrade/analyze.py
+++ b/freqtrade/analyze.py
@@ -21,12 +21,13 @@ def parse_ticker_dataframe(ticker: list) -> DataFrame:
     :param ticker: See exchange.get_ticker_history
     :return: DataFrame
     """
-    df = DataFrame(ticker) \
+    columns = {'C': 'close', 'V': 'volume', 'O': 'open', 'H': 'high', 'L': 'low', 'T': 'date'}
+    frame = DataFrame(ticker) \
         .drop('BV', 1) \
-        .rename(columns={'C': 'close', 'V': 'volume', 'O': 'open', 'H': 'high', 'L': 'low', 'T': 'date'})
-    df['date'] = to_datetime(df['date'], utc=True, infer_datetime_format=True)
-    df.sort_values('date', inplace=True)
-    return df
+        .rename(columns=columns)
+    frame['date'] = to_datetime(frame['date'], utc=True, infer_datetime_format=True)
+    frame.sort_values('date', inplace=True)
+    return frame
 
 
 def populate_indicators(dataframe: DataFrame) -> DataFrame:
@@ -116,19 +117,20 @@ def get_buy_signal(pair: str) -> bool:
     return signal
 
 
-def plot_dataframe(dataframe: DataFrame, pair: str) -> None:
+def plot_analyzed_dataframe(pair: str) -> None:
     """
-    Plots the given dataframe
-    :param dataframe: DataFrame
+    Calls analyze() and plots the returned dataframe
     :param pair: pair as str
     :return: None
     """
-
     import matplotlib
-
     matplotlib.use("Qt5Agg")
     import matplotlib.pyplot as plt
 
+    # Init Bittrex to use public API
+    exchange._API = Bittrex({'key': '', 'secret': ''})
+    dataframe = analyze_ticker(pair)
+
     # Two subplots sharing x axis
     fig, (ax1, ax2, ax3) = plt.subplots(3, sharex=True)
     fig.suptitle(pair, fontsize=14, fontweight='bold')
@@ -160,9 +162,6 @@ def plot_dataframe(dataframe: DataFrame, pair: str) -> None:
 if __name__ == '__main__':
     # Install PYQT5==5.9 manually if you want to test this helper function
     while True:
-        exchange._API = Bittrex({'key': '', 'secret': ''})
-        test_pair = 'BTC_ETH'
-        # for pair in ['BTC_ANT', 'BTC_ETH', 'BTC_GNT', 'BTC_ETC']:
-        #     get_buy_signal(pair)
-        plot_dataframe(analyze_ticker(test_pair), test_pair)
+        for p in ['BTC_ANT', 'BTC_ETH', 'BTC_GNT', 'BTC_ETC']:
+            plot_analyzed_dataframe(p)
         time.sleep(60)
diff --git a/freqtrade/persistence.py b/freqtrade/persistence.py
index c122d830e..41c9cadcb 100644
--- a/freqtrade/persistence.py
+++ b/freqtrade/persistence.py
@@ -14,7 +14,7 @@ logging.basicConfig(level=logging.DEBUG,
 logger = logging.getLogger(__name__)
 
 _CONF = {}
-Base = declarative_base()
+_DECL_BASE = declarative_base()
 
 
 def init(config: dict, db_url: Optional[str] = None) -> None:
@@ -37,7 +37,7 @@ def init(config: dict, db_url: Optional[str] = None) -> None:
     session = scoped_session(sessionmaker(bind=engine, autoflush=True, autocommit=True))
     Trade.session = session()
     Trade.query = session.query_property()
-    Base.metadata.create_all(engine)
+    _DECL_BASE.metadata.create_all(engine)
 
 
 def cleanup() -> None:
@@ -48,7 +48,7 @@ def cleanup() -> None:
     Trade.session.flush()
 
 
-class Trade(Base):
+class Trade(_DECL_BASE):
     __tablename__ = 'trades'
 
     id = Column(Integer, primary_key=True)
diff --git a/freqtrade/rpc/telegram.py b/freqtrade/rpc/telegram.py
index e964e68e7..7a056cd27 100644
--- a/freqtrade/rpc/telegram.py
+++ b/freqtrade/rpc/telegram.py
@@ -20,7 +20,7 @@ logging.getLogger('requests.packages.urllib3').setLevel(logging.INFO)
 logging.getLogger('telegram').setLevel(logging.INFO)
 logger = logging.getLogger(__name__)
 
-_updater: Updater = None
+_UPDATER: Updater = None
 _CONF = {}
 
 
@@ -32,13 +32,13 @@ def init(config: dict) -> None:
     :param config: config to use
     :return: None
     """
-    global _updater
+    global _UPDATER
 
     _CONF.update(config)
     if not is_enabled():
         return
 
-    _updater = Updater(token=config['telegram']['token'], workers=0)
+    _UPDATER = Updater(token=config['telegram']['token'], workers=0)
 
     # Register command handler and start telegram message polling
     handles = [
@@ -53,8 +53,8 @@ def init(config: dict) -> None:
         CommandHandler('help', _help),
     ]
     for handle in handles:
-        _updater.dispatcher.add_handler(handle)
-    _updater.start_polling(
+        _UPDATER.dispatcher.add_handler(handle)
+    _UPDATER.start_polling(
         clean=True,
         bootstrap_retries=3,
         timeout=30,
@@ -73,7 +73,7 @@ def cleanup() -> None:
     """
     if not is_enabled():
         return
-    _updater.stop()
+    _UPDATER.stop()
 
 
 def is_enabled() -> bool:
@@ -448,7 +448,7 @@ def send_msg(msg: str, bot: Bot = None, parse_mode: ParseMode = ParseMode.MARKDO
     if not is_enabled():
         return
     try:
-        bot = bot or _updater.bot
+        bot = bot or _UPDATER.bot
         try:
             bot.send_message(_CONF['telegram']['chat_id'], msg, parse_mode=parse_mode)
         except NetworkError as error:
@@ -459,5 +459,5 @@ def send_msg(msg: str, bot: Bot = None, parse_mode: ParseMode = ParseMode.MARKDO
                 error.message
             )
             bot.send_message(_CONF['telegram']['chat_id'], msg, parse_mode=parse_mode)
-    except Exception:
+    except BaseException:
         logger.exception('Exception occurred within Telegram API')