diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewData.kt b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewData.kt
index d5f64cc96e..b14a819844 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewData.kt
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewData.kt
@@ -268,7 +268,7 @@ class OverviewData @Inject constructor(
 
     var maxRatioValueFound = 5.0                    //even if sens data equals 0 for all the period, minimum scale is between 95% and 105%
     var minRatioValueFound = -maxRatioValueFound
-    val ratioScale = Scale()
+    var ratioScale = Scale()
     var ratioSeries: LineGraphSeries<ScaledDataPoint> = LineGraphSeries()
 
     var maxFromMaxValueFound = Double.MIN_VALUE
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.kt b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.kt
index c2055e61e8..498f98ee7f 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.kt
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.kt
@@ -15,6 +15,7 @@ import info.nightscout.androidaps.logging.AAPSLogger
 import info.nightscout.androidaps.plugins.general.overview.OverviewData
 import info.nightscout.androidaps.plugins.general.overview.graphExtensions.AreaGraphSeries
 import info.nightscout.androidaps.plugins.general.overview.graphExtensions.DoubleDataPoint
+import info.nightscout.androidaps.plugins.general.overview.graphExtensions.Scale
 import info.nightscout.androidaps.plugins.general.overview.graphExtensions.TimeAsXAxisLabelFormatter
 import info.nightscout.androidaps.utils.DefaultValueHelper
 import info.nightscout.androidaps.utils.Round
@@ -153,9 +154,12 @@ class GraphData(
         if (useForScale) {
             maxY = 100.0 + max(overviewData.maxRatioValueFound, abs(overviewData.minRatioValueFound))
             minY = 100.0 - max(overviewData.maxRatioValueFound, abs(overviewData.minRatioValueFound))
+            overviewData.ratioScale = Scale(100.0)
             overviewData.ratioScale.setMultiplier(1.0)
-        } else
+        } else {
+            overviewData.ratioScale = Scale()
             overviewData.ratioScale.setMultiplier(maxY * scale / max(overviewData.maxRatioValueFound, abs(overviewData.minRatioValueFound)))
+        }
         addSeries(overviewData.ratioSeries)
     }