diff --git a/reactfx/src/main/java/org/reactfx/Indicator.java b/reactfx/src/main/java/org/reactfx/Indicator.java
index e01340e..e4a345c 100644
--- a/reactfx/src/main/java/org/reactfx/Indicator.java
+++ b/reactfx/src/main/java/org/reactfx/Indicator.java
@@ -67,6 +67,10 @@ public boolean isOn() {
         return on;
     }
 
+    public boolean isOff() {
+        return !on;
+    }
+
     @Override
     public boolean get() {
         return on;