diff --git a/dabo/analyze.sh b/dabo/analyze.sh
index e33b894..7dfdd15 100755
--- a/dabo/analyze.sh
+++ b/dabo/analyze.sh
@@ -67,7 +67,7 @@ function analyze {
       else
         check_sell_conditions ${g_tmp}/${tmpfile}
       fi
-      f_buy_score=""
+      f_buy_score="0"
     fi
     if ! [ -f "${g_tmp}/open-${tmpfile}" ]
     then
@@ -77,7 +77,7 @@ function analyze {
       else
         check_buy_conditions ${g_tmp}/${tmpfile}
       fi
-      f_sell_score=""
+      f_sell_score="0"
     fi
     # Chart Part
     echo "$line,${f_market_performance},${f_buy_score},${f_sell_score}" >>analyze-${analyzedate}/chart-${tmpfile}