diff --git a/dabo/functions/get_macd_indicator.sh b/dabo/functions/get_macd_indicator.sh
index ff1463a..046f78b 100644
--- a/dabo/functions/get_macd_indicator.sh
+++ b/dabo/functions/get_macd_indicator.sh
@@ -19,7 +19,10 @@ function get_macd_indicator {
 
   # read last two lines 
   local f_lastline=$(tail -n1 "$f_hist_file" | grep ^2)
-  local f_second_lastline=$(tail -n2 "$f_hist_file" | head -n1 | grep ^2)
+
+  # force min 15min 2 last lines
+  local f_last_macd_period=$(echo "2*(900/${INTERVAL})" | bc -l | sed 's/\..*//')
+  local f_second_lastline=$(tail -n${f_last_macd_period} "$f_hist_file" | head -n1 | grep ^2)
 
   # Try to get current MACD values
   local f_macd_lastprice=$(echo "$f_lastline" | cut -d, -f2)