From 46072be01152c6cd1497bd4c2ebd3ce7fa41d134 Mon Sep 17 00:00:00 2001
From: Sam Germain <sam.germain@usask.ca>
Date: Fri, 31 Dec 2021 06:20:00 -0600
Subject: [PATCH] models.__init__ exception for no interest_rates on Margin
 trading

---
 freqtrade/persistence/models.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/freqtrade/persistence/models.py b/freqtrade/persistence/models.py
index 3314f8204..609a8c18c 100644
--- a/freqtrade/persistence/models.py
+++ b/freqtrade/persistence/models.py
@@ -335,7 +335,9 @@ class LocalTrade():
         if self.isolated_liq:
             self.set_isolated_liq(self.isolated_liq)
         self.recalc_open_trade_value()
-        # TODO-lev: Throw exception if on margin and interest_rate is none
+        if self.trading_mode == TradingMode.MARGIN and self.interest_rate is None:
+            raise OperationalException(
+                f"{self.trading_mode.value} trading requires param interest_rate on trades")
 
     def _set_stop_loss(self, stop_loss: float, percent: float):
         """