diff --git a/apps/statistics/app.cpp b/apps/statistics/app.cpp
index eea3cb2dc..fd396fdaa 100644
--- a/apps/statistics/app.cpp
+++ b/apps/statistics/app.cpp
@@ -23,7 +23,9 @@ App::Snapshot::Snapshot() :
   m_storeVersion(0),
   m_barVersion(0),
   m_rangeVersion(0),
+  m_selectedHistogramSeriesIndex(-1),
   m_selectedHistogramBarIndex(0),
+  m_selectedBoxSeriesIndex(-1),
   m_selectedBoxQuantile(BoxView::Quantile::Min)
 {
 }
@@ -52,10 +54,10 @@ App::App(Container * container, Snapshot * snapshot) :
   m_calculationController(&m_calculationAlternateEmptyViewController, &m_calculationHeader, snapshot->store()),
   m_calculationAlternateEmptyViewController(&m_calculationHeader, &m_calculationController, &m_calculationController),
   m_calculationHeader(&m_tabViewController, &m_calculationAlternateEmptyViewController, &m_calculationController),
-  m_boxController(&m_boxAlternateEmptyViewController, &m_boxHeader, snapshot->store(), snapshot->selectedBoxQuantile()),
+  m_boxController(&m_boxAlternateEmptyViewController, &m_boxHeader, snapshot->store(), snapshot->selectedBoxQuantile(), snapshot->selectedBoxSeriesIndex()),
   m_boxAlternateEmptyViewController(&m_boxHeader, &m_boxController, &m_boxController),
   m_boxHeader(&m_tabViewController, &m_boxAlternateEmptyViewController, &m_boxController),
-  m_histogramController(&m_histogramAlternateEmptyViewController, &m_histogramHeader, snapshot->store(), snapshot->storeVersion(), snapshot->barVersion(), snapshot->rangeVersion(), snapshot->selectedHistogramBarIndex()),
+  m_histogramController(&m_histogramAlternateEmptyViewController, &m_histogramHeader, snapshot->store(), snapshot->storeVersion(), snapshot->barVersion(), snapshot->rangeVersion(), snapshot->selectedHistogramBarIndex(), snapshot->selectedHistogramSeriesIndex()),
   m_histogramAlternateEmptyViewController(&m_histogramHeader, &m_histogramController, &m_histogramController),
   m_histogramHeader(&m_histogramStackViewController, &m_histogramAlternateEmptyViewController, &m_histogramController),
   m_histogramStackViewController(&m_tabViewController, &m_histogramHeader),
diff --git a/apps/statistics/app.h b/apps/statistics/app.h
index 60784bebc..06871fae4 100644
--- a/apps/statistics/app.h
+++ b/apps/statistics/app.h
@@ -29,16 +29,19 @@ public:
     uint32_t * storeVersion() { return &m_storeVersion; }
     uint32_t * barVersion() { return &m_barVersion; }
     uint32_t * rangeVersion() { return &m_rangeVersion; }
+    int * selectedHistogramSeriesIndex() { return &m_selectedHistogramSeriesIndex; }
     int * selectedHistogramBarIndex() { return &m_selectedHistogramBarIndex; }
+    int * selectedBoxSeriesIndex() { return &m_selectedBoxSeriesIndex; }
     BoxView::Quantile * selectedBoxQuantile() { return &m_selectedBoxQuantile; }
   private:
     Store m_store;
     uint32_t m_storeVersion;
     uint32_t  m_barVersion;
     uint32_t m_rangeVersion;
+    int m_selectedHistogramSeriesIndex;
     int m_selectedHistogramBarIndex;
+    int m_selectedBoxSeriesIndex;
     BoxView::Quantile m_selectedBoxQuantile;
-    // TODO add selected Series for both histogram and box
   };
 private:
   App(Container * container, Snapshot * snapshot);
diff --git a/apps/statistics/box_controller.cpp b/apps/statistics/box_controller.cpp
index 29d0b55e0..80129022f 100644
--- a/apps/statistics/box_controller.cpp
+++ b/apps/statistics/box_controller.cpp
@@ -6,17 +6,17 @@ using namespace Poincare;
 
 namespace Statistics {
 
-BoxController::BoxController(Responder * parentResponder, ButtonRowController * header, Store * store, BoxView::Quantile * selectedQuantile) :
-  MultipleDataViewController(parentResponder, store, (int *)(selectedQuantile)),
+BoxController::BoxController(Responder * parentResponder, ButtonRowController * header, Store * store, BoxView::Quantile * selectedQuantile, int * selectedSeriesIndex) :
+  MultipleDataViewController(parentResponder, store, (int *)(selectedQuantile), selectedSeriesIndex),
   ButtonRowDelegate(header, nullptr),
   m_view(this, store, selectedQuantile)
 {
 }
 
 bool BoxController::moveSelectionHorizontally(int deltaIndex) {
-  int selectedQuantile = (int)m_view.dataViewAtIndex(selectedSeries())->selectedQuantile();
+  int selectedQuantile = (int)m_view.dataViewAtIndex(selectedSeriesIndex())->selectedQuantile();
   int nextSelectedQuantile = selectedQuantile + deltaIndex;
-  if (m_view.dataViewAtIndex(selectedSeries())->selectQuantile(nextSelectedQuantile)) {
+  if (m_view.dataViewAtIndex(selectedSeriesIndex())->selectQuantile(nextSelectedQuantile)) {
     reloadBannerView();
     return true;
   }
@@ -32,14 +32,14 @@ Responder * BoxController::tabController() const {
 }
 
 void BoxController::reloadBannerView() {
-  if (selectedSeries() < 0) {
+  if (selectedSeriesIndex() < 0) {
     return;
   }
 
-  int selectedQuantile = (int)m_view.dataViewAtIndex(selectedSeries())->selectedQuantile();
+  int selectedQuantile = (int)m_view.dataViewAtIndex(selectedSeriesIndex())->selectedQuantile();
 
   // Set series name
-  char seriesChar = '0' + selectedSeries() + 1;
+  char seriesChar = '0' + selectedSeriesIndex() + 1;
   char bufferName[] = {' ', 'V', seriesChar, '/', 'N', seriesChar, 0};
   m_view.editableBannerView()->setLegendAtIndex(bufferName, 0);
 
@@ -52,7 +52,7 @@ void BoxController::reloadBannerView() {
   char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits) + 1];
   CalculPointer calculationMethods[5] = {&Store::minValue, &Store::firstQuartile, &Store::median, &Store::thirdQuartile,
     &Store::maxValue};
-  double calculation = (m_store->*calculationMethods[selectedQuantile])(selectedSeries());
+  double calculation = (m_store->*calculationMethods[selectedQuantile])(selectedSeriesIndex());
   int numberOfChar = PrintFloat::convertFloatToText<double>(calculation, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   buffer[numberOfChar++] = ' ';
   buffer[numberOfChar] = 0;
diff --git a/apps/statistics/box_controller.h b/apps/statistics/box_controller.h
index 2ee62a35e..1a9b30084 100644
--- a/apps/statistics/box_controller.h
+++ b/apps/statistics/box_controller.h
@@ -10,7 +10,7 @@ namespace Statistics {
 
 class BoxController : public MultipleDataViewController, public ButtonRowDelegate {
 public:
-  BoxController(Responder * parentResponder, ButtonRowController * header, Store * store, BoxView::Quantile * selectedQuantile);
+  BoxController(Responder * parentResponder, ButtonRowController * header, Store * store, BoxView::Quantile * selectedQuantile, int * selectedSeriesIndex);
 
   MultipleDataView * multipleDataView() override { return &m_view; }
   bool moveSelectionHorizontally(int deltaIndex) override;
diff --git a/apps/statistics/box_view.cpp b/apps/statistics/box_view.cpp
index a81a4812c..0ff506527 100644
--- a/apps/statistics/box_view.cpp
+++ b/apps/statistics/box_view.cpp
@@ -64,7 +64,7 @@ void BoxView::drawRect(KDContext * ctx, KDRect rect) const {
   double thirdQuart = m_store->thirdQuartile(m_series);
   double maxVal = m_store->maxValue(m_series);
 
-  bool isSelected = m_boxController->selectedSeries() == m_series;
+  bool isSelected = m_boxController->selectedSeriesIndex() == m_series;
   KDColor boxColor = isSelected ? m_selectedHistogramLightColor : Palette::GreyWhite;
   // Draw the main box
   KDCoordinate firstQuartilePixels = std::round(floatToPixel(Axis::Horizontal, firstQuart));
diff --git a/apps/statistics/histogram_controller.cpp b/apps/statistics/histogram_controller.cpp
index 185788d23..d0a818f33 100644
--- a/apps/statistics/histogram_controller.cpp
+++ b/apps/statistics/histogram_controller.cpp
@@ -13,8 +13,8 @@ namespace Statistics {
 static inline float min(float x, float y) { return (x<y ? x : y); }
 static inline float max(float x, float y) { return (x>y ? x : y); }
 
-HistogramController::HistogramController(Responder * parentResponder, ButtonRowController * header, Store * store, uint32_t * storeVersion, uint32_t * barVersion, uint32_t * rangeVersion, int * selectedBarIndex) :
-  MultipleDataViewController(parentResponder, store, selectedBarIndex),
+HistogramController::HistogramController(Responder * parentResponder, ButtonRowController * header, Store * store, uint32_t * storeVersion, uint32_t * barVersion, uint32_t * rangeVersion, int * selectedBarIndex, int * selectedSeriesIndex) :
+  MultipleDataViewController(parentResponder, store, selectedBarIndex, selectedSeriesIndex),
   ButtonRowDelegate(header, nullptr),
   m_view(this, store),
   m_storeVersion(storeVersion),
@@ -38,7 +38,7 @@ const char * HistogramController::title() {
 }
 
 bool HistogramController::handleEvent(Ion::Events::Event event) {
-  assert(selectedSeries() >= 0);
+  assert(selectedSeriesIndex() >= 0);
   if (event == Ion::Events::OK) {
     stackController()->push(histogramParameterController());
     return true;
@@ -66,14 +66,14 @@ void HistogramController::didBecomeFirstResponder() {
     initBarSelection();
     reloadBannerView();
   }
-  HistogramView * selectedHistogramView = static_cast<HistogramView *>(m_view.dataViewAtIndex(selectedSeries()));
-  selectedHistogramView->setHighlight(m_store->startOfBarAtIndex(selectedSeries(), *m_selectedBarIndex), m_store->endOfBarAtIndex(selectedSeries(), *m_selectedBarIndex));
+  HistogramView * selectedHistogramView = static_cast<HistogramView *>(m_view.dataViewAtIndex(selectedSeriesIndex()));
+  selectedHistogramView->setHighlight(m_store->startOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex), m_store->endOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex));
 }
 
 void HistogramController::willExitResponderChain(Responder * nextFirstResponder) {
   if (nextFirstResponder == nullptr || nextFirstResponder == tabController()) {
-    if (selectedSeries() >= 0) {
-      m_view.dataViewAtIndex(selectedSeries())->setForceOkDisplay(false);
+    if (selectedSeriesIndex() >= 0) {
+      m_view.dataViewAtIndex(selectedSeriesIndex())->setForceOkDisplay(false);
     }
   }
   MultipleDataViewController::willExitResponderChain(nextFirstResponder);
@@ -84,7 +84,7 @@ Responder * HistogramController::tabController() const {
 }
 
 void HistogramController::reloadBannerView() {
-  if (selectedSeries() < 0) {
+  if (selectedSeriesIndex() < 0) {
     return;
   }
   char buffer[k_maxNumberOfCharacters+ PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)*2];
@@ -97,16 +97,16 @@ void HistogramController::reloadBannerView() {
   numberOfChar += legendLength;
 
   // Add lower bound
-  if (selectedSeries() >= 0) {
-    double lowerBound = m_store->startOfBarAtIndex(selectedSeries(), *m_selectedBarIndex);
+  if (selectedSeriesIndex() >= 0) {
+    double lowerBound = m_store->startOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex);
     numberOfChar += PrintFloat::convertFloatToText<double>(lowerBound, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   }
 
   buffer[numberOfChar++] = ';';
 
   // Add upper bound
-  if (selectedSeries() >= 0) {
-    double upperBound = m_store->endOfBarAtIndex(selectedSeries(), *m_selectedBarIndex);
+  if (selectedSeriesIndex() >= 0) {
+    double upperBound = m_store->endOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex);
     numberOfChar += PrintFloat::convertFloatToText<double>(upperBound, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   }
 
@@ -126,8 +126,8 @@ void HistogramController::reloadBannerView() {
   strlcpy(buffer, legend, legendLength+1);
   numberOfChar += legendLength;
   double size = 0;
-  if (selectedSeries() >= 0) {
-    size = m_store->heightOfBarAtIndex(selectedSeries(), *m_selectedBarIndex);
+  if (selectedSeriesIndex() >= 0) {
+    size = m_store->heightOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex);
     numberOfChar += PrintFloat::convertFloatToText<double>(size, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   }
   // Padding
@@ -143,8 +143,8 @@ void HistogramController::reloadBannerView() {
   legendLength = strlen(legend);
   strlcpy(buffer, legend, legendLength+1);
   numberOfChar += legendLength;
-  if (selectedSeries() >= 0) {
-    double frequency = size/m_store->sumOfOccurrences(selectedSeries());
+  if (selectedSeriesIndex() >= 0) {
+    double frequency = size/m_store->sumOfOccurrences(selectedSeriesIndex());
     numberOfChar += PrintFloat::convertFloatToText<double>(frequency, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   }
   // Padding
@@ -159,17 +159,17 @@ bool HistogramController::moveSelectionHorizontally(int deltaIndex) {
   int newSelectedBarIndex = *m_selectedBarIndex;
   do {
     newSelectedBarIndex+=deltaIndex;
-  } while (m_store->heightOfBarAtIndex(selectedSeries(), newSelectedBarIndex) == 0
+  } while (m_store->heightOfBarAtIndex(selectedSeriesIndex(), newSelectedBarIndex) == 0
       && newSelectedBarIndex >= 0
-      && newSelectedBarIndex < m_store->numberOfBars(selectedSeries()));
+      && newSelectedBarIndex < m_store->numberOfBars(selectedSeriesIndex()));
 
   if (newSelectedBarIndex >= 0
-      && newSelectedBarIndex < m_store->numberOfBars(selectedSeries())
+      && newSelectedBarIndex < m_store->numberOfBars(selectedSeriesIndex())
       && *m_selectedBarIndex != newSelectedBarIndex)
   {
     *m_selectedBarIndex = newSelectedBarIndex;
-    m_view.dataViewAtIndex(selectedSeries())->setHighlight(m_store->startOfBarAtIndex(selectedSeries(), *m_selectedBarIndex), m_store->endOfBarAtIndex(selectedSeries(), *m_selectedBarIndex));
-    if (m_store->scrollToSelectedBarIndex(selectedSeries(), *m_selectedBarIndex)) {
+    m_view.dataViewAtIndex(selectedSeriesIndex())->setHighlight(m_store->startOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex), m_store->endOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex));
+    if (m_store->scrollToSelectedBarIndex(selectedSeriesIndex(), *m_selectedBarIndex)) {
       multipleDataView()->reload();
     }
     reloadBannerView();
@@ -179,7 +179,7 @@ bool HistogramController::moveSelectionHorizontally(int deltaIndex) {
 }
 
 void HistogramController::initRangeParameters() {
-  assert(selectedSeries() >= 0 && m_store->sumOfOccurrences(selectedSeries()) > 0);
+  assert(selectedSeriesIndex() >= 0 && m_store->sumOfOccurrences(selectedSeriesIndex()) > 0);
   float minValue = m_store->firstDrawnBarAbscissa();
   float maxValue = -FLT_MAX;
   for (int i = 0; i < Store::k_numberOfSeries; i ++) {
@@ -201,7 +201,7 @@ void HistogramController::initRangeParameters() {
   m_store->setXMin(xMin - Store::k_displayLeftMarginRatio*(xMax-xMin));
   m_store->setXMax(xMax + Store::k_displayRightMarginRatio*(xMax-xMin));
 
-  initYRangeParameters(selectedSeries());
+  initYRangeParameters(selectedSeriesIndex());
 }
 
 void HistogramController::initYRangeParameters(int series) {
@@ -232,7 +232,7 @@ void HistogramController::initYRangeParameters(int series) {
 }
 
 void HistogramController::initBarParameters() {
-  assert(selectedSeries() >= 0 && m_store->sumOfOccurrences(selectedSeries()) > 0);
+  assert(selectedSeriesIndex() >= 0 && m_store->sumOfOccurrences(selectedSeriesIndex()) > 0);
   float minValue = FLT_MAX;
   float maxValue = -FLT_MAX;
   for (int i = 0; i < Store::k_numberOfSeries; i ++) {
@@ -251,20 +251,20 @@ void HistogramController::initBarParameters() {
 }
 
 void HistogramController::initBarSelection() {
-  assert(selectedSeries() >= 0 && m_store->sumOfOccurrences(selectedSeries()) > 0);
+  assert(selectedSeriesIndex() >= 0 && m_store->sumOfOccurrences(selectedSeriesIndex()) > 0);
   *m_selectedBarIndex = 0;
-  while ((m_store->heightOfBarAtIndex(selectedSeries(), *m_selectedBarIndex) == 0 ||
-      m_store->startOfBarAtIndex(selectedSeries(), *m_selectedBarIndex) < m_store->firstDrawnBarAbscissa()) && *m_selectedBarIndex < m_store->numberOfBars(selectedSeries())) {
+  while ((m_store->heightOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex) == 0 ||
+      m_store->startOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex) < m_store->firstDrawnBarAbscissa()) && *m_selectedBarIndex < m_store->numberOfBars(selectedSeriesIndex())) {
     *m_selectedBarIndex = *m_selectedBarIndex+1;
   }
-  if (*m_selectedBarIndex >= m_store->numberOfBars(selectedSeries())) {
+  if (*m_selectedBarIndex >= m_store->numberOfBars(selectedSeriesIndex())) {
     /* No bar is after m_firstDrawnBarAbscissa, so we select the first bar */
     *m_selectedBarIndex = 0;
-    while (m_store->heightOfBarAtIndex(selectedSeries(), *m_selectedBarIndex) == 0 && *m_selectedBarIndex < m_store->numberOfBars(selectedSeries())) {
+    while (m_store->heightOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex) == 0 && *m_selectedBarIndex < m_store->numberOfBars(selectedSeriesIndex())) {
       *m_selectedBarIndex = *m_selectedBarIndex+1;
     }
   }
-  m_store->scrollToSelectedBarIndex(selectedSeries(), *m_selectedBarIndex);
+  m_store->scrollToSelectedBarIndex(selectedSeriesIndex(), *m_selectedBarIndex);
 }
 
 }
diff --git a/apps/statistics/histogram_controller.h b/apps/statistics/histogram_controller.h
index 826075cc9..1790723b6 100644
--- a/apps/statistics/histogram_controller.h
+++ b/apps/statistics/histogram_controller.h
@@ -11,7 +11,7 @@ namespace Statistics {
 class HistogramController : public MultipleDataViewController, public ButtonRowDelegate {
 
 public:
-  HistogramController(Responder * parentResponder, ButtonRowController * header, Store * store, uint32_t * m_storeVersion, uint32_t * m_barVersion, uint32_t * m_rangeVersion, int * m_selectedBarIndex);
+  HistogramController(Responder * parentResponder, ButtonRowController * header, Store * store, uint32_t * m_storeVersion, uint32_t * m_barVersion, uint32_t * m_rangeVersion, int * m_selectedBarIndex, int * selectedSeriesIndex);
 
   HistogramParameterController * histogramParameterController() { return &m_histogramParameterController; }
   void setCurrentDrawnSeries(int series);
diff --git a/apps/statistics/multiple_data_view_controller.cpp b/apps/statistics/multiple_data_view_controller.cpp
index df5b06b1f..876164e51 100644
--- a/apps/statistics/multiple_data_view_controller.cpp
+++ b/apps/statistics/multiple_data_view_controller.cpp
@@ -6,10 +6,10 @@ using namespace Shared;
 
 namespace Statistics {
 
-MultipleDataViewController::MultipleDataViewController(Responder * parentResponder, Store * store, int * selectedBarIndex) :
+MultipleDataViewController::MultipleDataViewController(Responder * parentResponder, Store * store, int * selectedBarIndex, int * selectedSeriesIndex) :
   ViewController(parentResponder),
   m_store(store),
-  m_selectedSeries(-1),
+  m_selectedSeriesIndex(selectedSeriesIndex),
   m_selectedBarIndex(selectedBarIndex)
 {
 }
@@ -28,23 +28,23 @@ Responder * MultipleDataViewController::defaultController() {
 
 void MultipleDataViewController::viewWillAppear() {
   multipleDataView()->setDisplayBanner(true);
-  if (m_selectedSeries < 0) {
-    m_selectedSeries = multipleDataView()->seriesOfSubviewAtIndex(0);
-    multipleDataView()->selectDataView(m_selectedSeries);
+  if (*m_selectedSeriesIndex < 0) {
+    *m_selectedSeriesIndex = multipleDataView()->seriesOfSubviewAtIndex(0);
+    multipleDataView()->selectDataView(*m_selectedSeriesIndex);
   }
   reloadBannerView();
   multipleDataView()->reload();
 }
 
 bool MultipleDataViewController::handleEvent(Ion::Events::Event event) {
-  assert(m_selectedSeries >= 0);
+  assert(*m_selectedSeriesIndex >= 0);
   if (event == Ion::Events::Down) {
-    int currentSelectedSubview = multipleDataView()->indexOfSubviewAtSeries(m_selectedSeries);
+    int currentSelectedSubview = multipleDataView()->indexOfSubviewAtSeries(*m_selectedSeriesIndex);
     if (currentSelectedSubview < m_store->numberOfNonEmptySeries() - 1) {
-      multipleDataView()->deselectDataView(m_selectedSeries);
-      m_selectedSeries = multipleDataView()->seriesOfSubviewAtIndex(currentSelectedSubview+1);
+      multipleDataView()->deselectDataView(*m_selectedSeriesIndex);
+      *m_selectedSeriesIndex = multipleDataView()->seriesOfSubviewAtIndex(currentSelectedSubview+1);
       *m_selectedBarIndex = MultipleDataView::k_defaultSelectedBar;
-      multipleDataView()->selectDataView(m_selectedSeries);
+      multipleDataView()->selectDataView(*m_selectedSeriesIndex);
       reloadBannerView();
       app()->setFirstResponder(this);
       return true;
@@ -52,12 +52,12 @@ bool MultipleDataViewController::handleEvent(Ion::Events::Event event) {
     return false;
   }
   if (event == Ion::Events::Up) {
-    int currentSelectedSubview = multipleDataView()->indexOfSubviewAtSeries(m_selectedSeries);
+    int currentSelectedSubview = multipleDataView()->indexOfSubviewAtSeries(*m_selectedSeriesIndex);
     if (currentSelectedSubview > 0) {
-      multipleDataView()->deselectDataView(m_selectedSeries);
-      m_selectedSeries = multipleDataView()->seriesOfSubviewAtIndex(currentSelectedSubview-1);
+      multipleDataView()->deselectDataView(*m_selectedSeriesIndex);
+      *m_selectedSeriesIndex = multipleDataView()->seriesOfSubviewAtIndex(currentSelectedSubview-1);
       *m_selectedBarIndex = MultipleDataView::k_defaultSelectedBar;
-      multipleDataView()->selectDataView(m_selectedSeries);
+      multipleDataView()->selectDataView(*m_selectedSeriesIndex);
       app()->setFirstResponder(this);
     } else {
       app()->setFirstResponder(tabController());
@@ -65,7 +65,7 @@ bool MultipleDataViewController::handleEvent(Ion::Events::Event event) {
     reloadBannerView();
     return true;
   }
-  if (m_selectedSeries >= 0 && (event == Ion::Events::Left || event == Ion::Events::Right)) {
+  if (*m_selectedSeriesIndex >= 0 && (event == Ion::Events::Left || event == Ion::Events::Right)) {
     int direction = event == Ion::Events::Left ? -1 : 1;
     moveSelectionHorizontally(direction);
     return true;
@@ -75,21 +75,21 @@ bool MultipleDataViewController::handleEvent(Ion::Events::Event event) {
 
 void MultipleDataViewController::didBecomeFirstResponder() {
   multipleDataView()->setDisplayBanner(true);
-  if (m_selectedSeries < 0 || m_store->sumOfOccurrences(m_selectedSeries) == 0) {
-    if (m_selectedSeries >= 0) {
-      multipleDataView()->deselectDataView(m_selectedSeries);
+  if (*m_selectedSeriesIndex < 0 || m_store->sumOfOccurrences(*m_selectedSeriesIndex) == 0) {
+    if (*m_selectedSeriesIndex >= 0) {
+      multipleDataView()->deselectDataView(*m_selectedSeriesIndex);
     }
-    m_selectedSeries = multipleDataView()->seriesOfSubviewAtIndex(0);
-    multipleDataView()->selectDataView(m_selectedSeries);
+    *m_selectedSeriesIndex = multipleDataView()->seriesOfSubviewAtIndex(0);
+    multipleDataView()->selectDataView(*m_selectedSeriesIndex);
     multipleDataView()->reload();
   }
 }
 
 void MultipleDataViewController::willExitResponderChain(Responder * nextFirstResponder) {
   if (nextFirstResponder == nullptr || nextFirstResponder == tabController()) {
-    if (m_selectedSeries >= 0) {
-      multipleDataView()->dataViewAtIndex(m_selectedSeries)->selectMainView(false);
-      m_selectedSeries = -1;
+    if (*m_selectedSeriesIndex >= 0) {
+      multipleDataView()->dataViewAtIndex(*m_selectedSeriesIndex)->selectMainView(false);
+      *m_selectedSeriesIndex = -1;
       multipleDataView()->setDisplayBanner(false);
     }
   }
diff --git a/apps/statistics/multiple_data_view_controller.h b/apps/statistics/multiple_data_view_controller.h
index b8f5041d0..e3dfa92ed 100644
--- a/apps/statistics/multiple_data_view_controller.h
+++ b/apps/statistics/multiple_data_view_controller.h
@@ -10,9 +10,9 @@ namespace Statistics {
 class MultipleDataViewController : public ViewController, public AlternateEmptyViewDelegate {
 
 public:
-  MultipleDataViewController(Responder * parentResponder, Store * store, int * m_selectedBarIndex);
+  MultipleDataViewController(Responder * parentResponder, Store * store, int * m_selectedBarIndex, int * selectedSeriesIndex);
   virtual MultipleDataView * multipleDataView() = 0;
-  int selectedSeries() const { return m_selectedSeries; }
+  int selectedSeriesIndex() const { return *m_selectedSeriesIndex; }
   // AlternateEmptyViewDelegate
   bool isEmpty() const override;
   I18n::Message emptyMessage() override;
@@ -31,7 +31,7 @@ protected:
   virtual void reloadBannerView() = 0;
   virtual bool moveSelectionHorizontally(int deltaIndex) = 0;
   Store * m_store;
-  int m_selectedSeries;
+  int * m_selectedSeriesIndex;
   int * m_selectedBarIndex;
 };