+URL="http://$HOST/export_data.csv?\
+currency=$CURRENCY&\
+data_type=price&\
+exchange=$EXCHANGE&\
+t=l&\
+timespan=$TIMESPAN"
+
+if ! wget -S --spider $URL 2>&1 | grep 'HTTP/1.1 200 OK' >/dev/null; then
+ echo "Can not retrieve data from $HOST!";
+ exit 1
+fi
+
+cat << EOF | gnuplot 2>/dev/null