diff --git a/freqtrade/constants.py b/freqtrade/constants.py
index 53cae8a8e..ffbc57d62 100644
--- a/freqtrade/constants.py
+++ b/freqtrade/constants.py
@@ -494,3 +494,4 @@ TradeList = List[List]
 
 LongShort = Literal['long', 'short']
 EntryExit = Literal['entry', 'exit']
+BuySell = Literal['buy', 'sell']
diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index 08bdab265..59089b630 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -20,7 +20,7 @@ from ccxt.base.decimal_to_precision import (ROUND_DOWN, ROUND_UP, TICK_SIZE, TRU
                                             decimal_to_precision)
 from pandas import DataFrame
 
-from freqtrade.constants import (DEFAULT_AMOUNT_RESERVE_PERCENT, NON_OPEN_EXCHANGE_STATES,
+from freqtrade.constants import (DEFAULT_AMOUNT_RESERVE_PERCENT, NON_OPEN_EXCHANGE_STATES, BuySell,
                                  EntryExit, ListPairsWithTimeframes, PairWithTimeframe)
 from freqtrade.data.converter import ohlcv_to_dataframe, trades_dict_to_list
 from freqtrade.enums import OPTIMIZE_MODES, CandleType, MarginMode, TradingMode
@@ -962,7 +962,7 @@ class Exchange:
         *,
         pair: str,
         ordertype: str,
-        side: str,
+        side: BuySell,
         amount: float,
         rate: float,
         leverage: float,
diff --git a/freqtrade/exchange/okx.py b/freqtrade/exchange/okx.py
index fb7388ee1..3599d334b 100644
--- a/freqtrade/exchange/okx.py
+++ b/freqtrade/exchange/okx.py
@@ -3,6 +3,7 @@ from typing import Dict, List, Tuple
 
 import ccxt
 
+from freqtrade.constants import BuySell
 from freqtrade.enums import MarginMode, TradingMode
 from freqtrade.exceptions import DDosProtection, OperationalException, TemporaryError
 from freqtrade.exchange import Exchange
@@ -52,7 +53,7 @@ class Okx(Exchange):
         return params
 
     @retrier
-    def _lev_prep(self, pair: str, leverage: float, side: str):
+    def _lev_prep(self, pair: str, leverage: float, side: BuySell):
         if self.trading_mode != TradingMode.SPOT and self.margin_mode is not None:
             try:
                 # TODO-lev: Test me properly (check mgnMode passed)
diff --git a/freqtrade/freqtradebot.py b/freqtrade/freqtradebot.py
index 4acf94c32..2a1709da3 100644
--- a/freqtrade/freqtradebot.py
+++ b/freqtrade/freqtradebot.py
@@ -13,7 +13,7 @@ from schedule import Scheduler
 
 from freqtrade import __version__, constants
 from freqtrade.configuration import validate_config_consistency
-from freqtrade.constants import LongShort
+from freqtrade.constants import BuySell, LongShort
 from freqtrade.data.converter import order_book_to_dataframe
 from freqtrade.data.dataprovider import DataProvider
 from freqtrade.edge import Edge
@@ -594,7 +594,8 @@ class FreqtradeBot(LoggingMixin):
         """
         time_in_force = self.strategy.order_time_in_force['entry']
 
-        [side, name] = ['sell', 'Short'] if is_short else ['buy', 'Long']
+        side: BuySell = 'sell' if is_short else 'buy'
+        name = 'Short' if is_short else 'Long'
         trade_side: LongShort = 'short' if is_short else 'long'
         pos_adjust = trade is not None
 
diff --git a/freqtrade/persistence/models.py b/freqtrade/persistence/models.py
index 299032bb4..352079b2e 100644
--- a/freqtrade/persistence/models.py
+++ b/freqtrade/persistence/models.py
@@ -13,7 +13,7 @@ from sqlalchemy.orm import Query, declarative_base, relationship, scoped_session
 from sqlalchemy.pool import StaticPool
 from sqlalchemy.sql.schema import UniqueConstraint
 
-from freqtrade.constants import DATETIME_PRINT_FORMAT, NON_OPEN_EXCHANGE_STATES, LongShort
+from freqtrade.constants import DATETIME_PRINT_FORMAT, NON_OPEN_EXCHANGE_STATES, BuySell, LongShort
 from freqtrade.enums import ExitType, TradingMode
 from freqtrade.exceptions import DependencyException, OperationalException
 from freqtrade.leverage import interest
@@ -386,7 +386,7 @@ class LocalTrade():
             return "buy"
 
     @property
-    def exit_side(self) -> str:
+    def exit_side(self) -> BuySell:
         if self.is_short:
             return "buy"
         else: