diff --git a/README.md b/README.md
index 814492c..e20c3da 100644
--- a/README.md
+++ b/README.md
@@ -188,6 +188,10 @@ docker compose logs -f
 
 Update:
 ```
+# Optinal: Remove local data
+git reset --hard HEAD^   # Remove local commits
+git clean -fd            # Remove local uncommited files
+
 git pull -f --all
 ```
 
diff --git a/dabo/functions/get_ema.sh b/dabo/functions/get_ema.sh
index a26272e..f7007b5 100644
--- a/dabo/functions/get_ema.sh
+++ b/dabo/functions/get_ema.sh
@@ -7,7 +7,14 @@ function get_ema {
   local f_lastvalue="$5"
   
   f_ema=""
-  
+ 
+  # force minimum 15min timeframe
+  if [ $(echo "${INTERVAL} < 900" | bc -l) -ne 0 ]
+  then
+    f_period=$(echo "${f_period}*(900/${INTERVAL})" | bc -l | sed 's/\..*//')
+    g_echo "ATTENTION!!!! Period lower then 15 minutes - correcting to $f_period"
+  fi
+ 
   # calculate EMA if last EMA is given
   if [ -n "$f_last_ema" ]
   then
diff --git a/dabo/functions/get_macd_indicator.sh b/dabo/functions/get_macd_indicator.sh
index d11188b..ff1463a 100644
--- a/dabo/functions/get_macd_indicator.sh
+++ b/dabo/functions/get_macd_indicator.sh
@@ -42,7 +42,7 @@ function get_macd_indicator {
   f_macd_last_ema9_signal=$(echo "$f_second_lastline" | cut -d, -f7)
   f_macd_last_histogram=$(echo "$f_second_lastline" | cut -d, -f8)
 
-  # calc EMA12 
+  # calc EMA12
   get_ema "${f_hist_file}" 2 12 "${f_macd_last_ema12}" "${f_macd_lastprice}"
   if [ -z "${f_ema}" ]
   then