total amount passed to edge should consider open trades too

freqtrade/freqtradebot.py

@@ -305,7 +305,8 @@ class FreqtradeBot(object):
             return self.edge.stake_amount(
                 pair,
                 self.wallets.get_free(self.config['stake_currency']),
-                self.wallets.get_total(self.config['stake_currency'])
+                self.wallets.get_total(self.config['stake_currency']) +
+                Trade.calc_total_open_trades_in_stake_currency()
             )
         else:
             stake_amount = self.config['stake_amount']

freqtrade/persistence.py

@@ -14,6 +14,7 @@ from sqlalchemy.exc import NoSuchModuleError
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm.scoping import scoped_session
 from sqlalchemy.orm.session import sessionmaker
+from sqlalchemy import func
 from sqlalchemy.pool import StaticPool
 
 from freqtrade import OperationalException
@@ -349,3 +350,13 @@ class Trade(_DECL_BASE):
         )
         profit_percent = (close_trade_price / open_trade_price) - 1
         return float(f"{profit_percent:.8f}")
+
+    def calc_total_open_trades_in_stake_currency() -> float:
+        """
+        Calculates total invested amount in open trades
+        in stake currency
+        """
+        total_open_stake_amount = Trade.session.query(func.sum(Trade.stake_amount))\
+            .filter(Trade.is_open.is_(True))\
+            .scalar()
+        return total_open_stake_amount or 0