diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewFragment.java b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewFragment.java
index 595102cf04..bdda2f47dd 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewFragment.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/OverviewFragment.java
@@ -1560,7 +1560,7 @@ public class OverviewFragment extends Fragment implements View.OnClickListener,
             graphData.formatAxis(fromTime, endTime);
 
             if(SP.getBoolean("showactivityprimary", true)) {
-                graphData.addActivity(fromTime, endTime, 1d);
+                graphData.addActivity(fromTime, endTime, false,1d);
             }
 
             // Treatments
@@ -1588,6 +1588,7 @@ public class OverviewFragment extends Fragment implements View.OnClickListener,
             boolean useDevForScale = false;
             boolean useRatioForScale = false;
             boolean useDSForScale = false;
+            boolean useIAForScale = false;
 
             if (SP.getBoolean("showiob", true)) {
                 useIobForScale = true;
@@ -1597,6 +1598,8 @@ public class OverviewFragment extends Fragment implements View.OnClickListener,
                 useDevForScale = true;
             } else if (SP.getBoolean("showratios", false)) {
                 useRatioForScale = true;
+            } else if (SP.getBoolean("showactivitysecondary", false)) {
+                useIAForScale = true;
             } else if (SP.getBoolean("showdevslope", false)) {
                 useDSForScale = true;
             }
@@ -1610,7 +1613,7 @@ public class OverviewFragment extends Fragment implements View.OnClickListener,
             if (SP.getBoolean("showratios", false))
                 secondGraphData.addRatio(fromTime, now, useRatioForScale, 1d);
             if(SP.getBoolean("showactivitysecondary", true))
-                secondGraphData.addActivity(fromTime, endTime, 1d);
+                secondGraphData.addActivity(fromTime, endTime, useIAForScale,1d);
             if (SP.getBoolean("showdevslope", false) && MainApp.devBranch)
                 secondGraphData.addDeviationSlope(fromTime, now, useDSForScale, 1d);
 
@@ -1627,6 +1630,7 @@ public class OverviewFragment extends Fragment implements View.OnClickListener,
                             || SP.getBoolean("showcob", true)
                             || SP.getBoolean("showdeviations", false)
                             || SP.getBoolean("showratios", false)
+                            || SP.getBoolean("showactivitysecondary", false)
                             || SP.getBoolean("showdevslope", false)) {
                         iobGraph.setVisibility(View.VISIBLE);
                     } else {
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.java b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.java
index fb073b77bd..29e190055a 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/overview/graphData/GraphData.java
@@ -346,7 +346,7 @@ public class GraphData {
                 ? Profile.fromMgdlToUnits(bgReadingsArray.get(0).value, units) : Profile.fromMgdlToUnits(100, units);
     }
 
-    public void addActivity(long fromTime, long toTime, double scale) {
+    public void addActivity(long fromTime, long toTime, boolean useForScale, double scale) {
         FixedLineGraphSeries<ScaledDataPoint> actSeriesHist;
         List<ScaledDataPoint> actArrayHist = new ArrayList<>();
         FixedLineGraphSeries<ScaledDataPoint> actSeriesPred;
@@ -369,9 +369,6 @@ public class GraphData {
                 actArrayPred.add(new ScaledDataPoint(time, act, actScale));
         }
 
-        double maxIAValue = SP.getDouble(R.string.key_scale_insulin_activity, 0.05);
-        actScale.setMultiplier(maxY*scale / maxIAValue);
-
         ScaledDataPoint[] actData = new ScaledDataPoint[actArrayHist.size()];
         actData = actArrayHist.toArray(actData);
         actSeriesHist = new FixedLineGraphSeries<>(actData);
@@ -392,6 +389,13 @@ public class GraphData {
         paint.setColor(MainApp.gc(R.color.activity));
         actSeriesPred.setCustomPaint(paint);
 
+        double maxIAValue = SP.getDouble(R.string.key_scale_insulin_activity, 0.05);
+        if (useForScale) {
+            maxY = maxIAValue;
+            minY = -maxIAValue;
+        }
+        actScale.setMultiplier(maxY * scale / maxIAValue);
+
         addSeries(actSeriesPred);
     }