diff --git a/dabo/analyze.sh b/dabo/analyze.sh
index 999214a..6124b2a 100755
--- a/dabo/analyze.sh
+++ b/dabo/analyze.sh
@@ -84,6 +84,7 @@ function analyze {
     # Chart Part
     local f_intrade=0
     local f_score=${f_buy_score}
+    local f_interim=0
     [ -z "${f_buy_score}" ] && f_buy_score=0
     if [ -z "${f_sell_score}" ] 
     then
@@ -91,8 +92,8 @@ function analyze {
     else
       f_score=${f_sell_score}
       f_intrade=1
+      [ -s ${g_tmp}/interim-${tmpfile} ] && f_interim=$(tail -n1 ${g_tmp}/interim-${tmpfile})
     fi
-    local f_interim=$(tail -n1 ${g_tmp}/interim-${tmpfile})
     echo "$line,${f_market_performance},${f_score},${f_buy_score},${f_sell_score},${f_intrade},${f_interim}" >>analyze-${analyzedate}/chart-${tmpfile}
     # Chart Part End
   done