diff --git a/dabo/functions/order.sh b/dabo/functions/order.sh
index 4fbc982..34b365a 100644
--- a/dabo/functions/order.sh
+++ b/dabo/functions/order.sh
@@ -33,7 +33,15 @@ function order {
   local f_type f_side_opposite f_pos_side f_side_opposide f_trigger_sl f_trigger_tp
 
   ### validity checks ###
- 
+
+  if [ -z "$f_symbol" ] || [ -z "$f_amount" ] || [ -z "$f_side" ] || [ -z "$f_price" ]
+  then
+    g_echo_error "Missing values!
+Usage: order symbol amount side price [stoploss] [takeprofit]
+Given: ${FUNCNAME} $@"
+    return 1
+  fi
+
   # check symbol XXX/$CURRENCY[:$CURRENCY]
   [[ $f_symbol =~ /$CURRENCY ]] || return 1