diff --git a/BollingerBands.js b/BollingerBands.js
index 81e1158eb..211c7e0c6 100644
--- a/BollingerBands.js
+++ b/BollingerBands.js
@@ -642,12 +642,17 @@
         }
     }
 
-    function onOffsetChanged() {
+    function onOffsetChanged(event) {
 
         try {
 
+            if (event !== undefined) {
+                if (event.recalculate === true) {
+                    recalculate()
+                    return
+                }
+            }
             if (Math.random() * 100 > 95) {
-
                 recalculate()
             };
 
diff --git a/PercentageBandwidth.js b/PercentageBandwidth.js
index c2b694992..549417b11 100644
--- a/PercentageBandwidth.js
+++ b/PercentageBandwidth.js
@@ -883,12 +883,17 @@
         }
     }
 
-    function onOffsetChanged() {
+    function onOffsetChanged(event) {
 
         try {
 
+            if (event !== undefined) {
+                if (event.recalculate === true) {
+                    recalculate()
+                    return
+                }
+            }
             if (Math.random() * 100 > 95) {
-
                 recalculate()
             };