diff --git a/check-health b/check-health
index bf0e441..9fef8bc 100644
--- a/check-health
+++ b/check-health
@@ -17,6 +17,7 @@
 :global CheckHealthVoltagePercent;
 :global Identity;
 
+:global IfThenElse;
 :global LogPrintExit2;
 :global ScriptLock;
 :global SendNotification2;
@@ -46,7 +47,8 @@ $ScriptLock $0;
     :if ($CheckHealthLast->$Name * (100 + $CheckHealthVoltagePercent) < $Voltage * 100 || \
          $CheckHealthLast->$Name * 100 > $Voltage * (100 + $CheckHealthVoltagePercent)) do={
       $SendNotification2 ({ origin=$0; \
-        subject=([ $SymbolForNotification "high-voltage-sign" ] . "Health warning: " . $Name); \
+        subject=([ $SymbolForNotification ("high-voltage-sign,chart-" . [ $IfThenElse ($CheckHealthLast->$Name < \
+          $Voltage) "in" "de" ] . "creasing") ] . "Health warning: " . $Name); \
         message=("The " . $Name . " on " . $Identity . " jumped more than " . $CheckHealthVoltagePercent . "%.\n\n" . \
           "old value: " . [ $FormatVoltage ($CheckHealthLast->$Name) ] . "\n" . \
           "new value: " . [ $FormatVoltage $Voltage ]) });
diff --git a/doc/check-health.d/notification-01-voltage.svg b/doc/check-health.d/notification-01-voltage.svg
index 81f7178..b762f61 100644
--- a/doc/check-health.d/notification-01-voltage.svg
+++ b/doc/check-health.d/notification-01-voltage.svg
@@ -151,7 +151,7 @@
        y="0"><tspan
          x="180"
          y="10.85"
-         id="tspan13643">[MikroTik] ⚡ Health warning: voltage
+         id="tspan13643">[MikroTik] ⚡📉 Health warning: voltage
 </tspan><tspan
          x="180"
          y="25.85"
diff --git a/global-functions b/global-functions
index f5bca7a..19f5777 100644
--- a/global-functions
+++ b/global-functions
@@ -1035,6 +1035,8 @@
   :local Symbols {
     "alarm-clock"="\E2\8F\B0";
     "calendar"="\F0\9F\93\85";
+    "chart-decreasing"="\F0\9F\93\89";
+    "chart-increasing"="\F0\9F\93\88";
     "cloud"="\E2\98\81";
     "cross-mark"="\E2\9D\8C";
     "fire"="\F0\9F\94\A5";