1 files changed, 4 insertions, 0 deletions

diff --git a/portfolio.py b/portfolio.py
index 146ee79..1067b0b 100644
--- a/portfolio.py
+++ b/portfolio.py
@@ -311,6 +311,10 @@ class Trade:
         if self.action is None:
             return None
         ticker = self.market.get_ticker(self.currency, self.base_currency)
+        if ticker is None:
+            self.market.report.log_error("prepare_order",
+                    message="Unknown ticker {}/{}".format(self.currency, self.base_currency))
+            return None
         self.inverted = ticker["inverted"]
         if self.inverted:
             ticker = ticker["original"]