diff --git a/td.py b/td.py
index f38a828f..0476703c 100644
--- a/td.py
+++ b/td.py
@@ -11,6 +11,7 @@ import time
 
 from config import applongname, appversion, config
 
+# These are specific to Trade Dangerous, so don't move to data.py
 demandbracketmap = { 0: '?',
                      1: 'L',
                      2: 'M',