diff --git a/nullptr/commander.py b/nullptr/commander.py
index 108a877..8b84e92 100644
--- a/nullptr/commander.py
+++ b/nullptr/commander.py
@@ -130,9 +130,9 @@ class Commander(CommandLine):
     resource = delivery['trade_symbol']
     destination = delivery['destination']
     m = self.analyzer.find_closest_markets(resource, 'buy', destination)
-    if len(m) is None:
+    if len(m) == 0:
       m = self.analyzer.find_closest_markets(resource, 'exchange', destination)
-    if len(m) is None:
+    if len(m) == 0:
       print('no market found')
       return
     _, m, _, _ = m[0]