diff --git a/freqtrade/wallets.py b/freqtrade/wallets.py
index 4c3a0f657..dd706438f 100644
--- a/freqtrade/wallets.py
+++ b/freqtrade/wallets.py
@@ -52,7 +52,12 @@ class Wallets:
             return 0
 
     def _update_dry(self) -> None:
-        """ Update from database in dry-run mode"""
+        """
+        Update from database in dry-run mode
+        - Apply apply profits of closed trades on top of stake amount
+        - Subtract currently tied up stake_amount in open trades
+        - update balances for currencies currently in trades
+        """
         closed_trades = Trade.get_trades(Trade.is_open.is_(False)).all()
         open_trades = Trade.get_trades(Trade.is_open.is_(True)).all()
         tot_profit = sum([trade.calc_profit() for trade in closed_trades])