diff --git a/apps/sequence/Makefile b/apps/sequence/Makefile
index 1dff36fec..c7422d182 100644
--- a/apps/sequence/Makefile
+++ b/apps/sequence/Makefile
@@ -5,6 +5,7 @@ app_objs += $(addprefix apps/sequence/,\
   graph/curve_view_range.o\
   graph/graph_controller.o\
   graph/graph_view.o\
+  graph/term_sum_controller.o\
   graph/vertical_cursor_view.o\
   list/list_controller.o\
   list/list_parameter_controller.o\
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
new file mode 100644
index 000000000..2a95ebb04
--- /dev/null
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -0,0 +1,147 @@
+#include "term_sum_controller.h"
+#include "../../shared/text_field_delegate.h"
+#include <assert.h>
+#include <math.h>
+
+using namespace Shared;
+
+namespace Sequence {
+
+TermSumController::TermSumController(Responder * parentResponder, GraphView * graphView, CurveViewRange * graphRange, CurveViewCursor * cursor) :
+  ViewController(parentResponder),
+  m_contentView(ContentView(graphView)),
+  m_graphRange(graphRange),
+  m_sequence(nullptr),
+  m_cursor(cursor),
+  m_cursorView(VerticalCursorView())
+{
+}
+
+const char * TermSumController::title() const {
+  return "Sommes des termes";
+}
+
+View * TermSumController::view() {
+  return &m_contentView;
+}
+
+void TermSumController::viewWillAppear() {
+  m_contentView.graphView()->setVerticalCursor(true);
+  m_contentView.graphView()->setCursorView(&m_cursorView);
+  m_contentView.graphView()->setBannerView(nullptr);
+  m_contentView.graphView()->selectMainView(true);
+  m_contentView.graphView()->reload();
+  m_contentView.layoutSubviews();
+}
+
+bool TermSumController::handleEvent(Ion::Events::Event event) {
+  if (event == Ion::Events::Left) {
+    if (step > 0) {
+      return false;
+    }
+    if (moveCursorHorizontallyToPosition(roundf(m_cursor->x()-1.0f))) {
+      m_contentView.graphView()->reload();
+      return true;
+    }
+    return false;
+  }
+  if (event == Ion::Events::Right) {
+    if (moveCursorHorizontallyToPosition(roundf(m_cursor->x()+1.0f))) {
+      m_contentView.graphView()->reload();
+      return true;
+    }
+    return false;
+  }
+  if (event.hasText() && event.text()[0] >= '0' && event.text()[0] <= '9') {
+    if (step > 0 && event.text()[0]-'0' < m_cursor->x()) {
+      return false;
+    }
+    if (moveCursorHorizontallyToPosition(event.text()[0]-'0')) {
+      m_contentView.graphView()->reload();
+      return true;
+    }
+    return false;
+  }
+
+  return false;
+}
+
+bool TermSumController::moveCursorHorizontallyToPosition(int position) {
+  if (position < 0) {
+    return false;
+  }
+  float x = position;
+  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
+  if (m_sequence == nullptr) {
+    return false;
+  }
+  float y = m_sequence->evaluateAtAbscissa(x, myApp->localContext());
+  m_cursor->moveTo(x, y);
+  m_graphRange->panToMakePointVisible(x, y, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  return true;
+}
+
+void TermSumController::setSequence(Sequence * sequence) {
+  m_sequence = sequence;
+}
+
+/* Content View */
+
+TermSumController::ContentView::ContentView(GraphView * graphView) :
+  m_graphView(graphView)
+{
+}
+
+int TermSumController::ContentView::numberOfSubviews() const {
+  return 2;
+}
+
+View * TermSumController::ContentView::subviewAtIndex(int index) {
+  assert(index >= 0 && index < 2);
+  if (index == 0) {
+    return m_graphView;
+  }
+  return &m_legendView;
+}
+
+void TermSumController::ContentView::layoutSubviews() {
+  m_graphView->setFrame(bounds());
+  m_legendView.setFrame(KDRect(0, bounds().height() - k_legendHeight, bounds().width(), k_legendHeight));
+}
+
+GraphView * TermSumController::ContentView::graphView() {
+  return m_graphView;
+}
+
+/* Legend View */
+
+TermSumController::ContentView::LegendView::LegendView() :
+  m_sum(ExpressionView(0.0f, 0.5f, KDColorBlack, Palette::GreyBright)),
+  m_legend(PointerTextView(KDText::FontSize::Small, "SELECTIONNER LE PREMIER TERME", 0.0f, 0.5f, KDColorBlack, Palette::GreyBright))
+{
+}
+
+void TermSumController::ContentView::LegendView::drawRect(KDContext * ctx, KDRect rect) const {
+  ctx->fillRect(KDRect(0, bounds().height() - k_legendHeight, bounds().width(), k_legendHeight), Palette::GreyBright);
+}
+
+int TermSumController::ContentView::LegendView::numberOfSubviews() const {
+  return 2;
+}
+
+View * TermSumController::ContentView::LegendView::subviewAtIndex(int index) {
+  assert(index >= 0 && index < 2);
+  if (index == 0) {
+    return &m_sum;
+  }
+  return &m_legend;
+}
+
+void TermSumController::ContentView::LegendView::layoutSubviews() {
+  KDCoordinate width = bounds().width();
+  KDCoordinate heigth = bounds().height();
+  m_sum.setFrame(KDRect(0, 0, width/2, heigth));
+  m_legend.setFrame(KDRect(width/2, 0, width/2, heigth));
+}
+
+}
diff --git a/apps/sequence/graph/term_sum_controller.h b/apps/sequence/graph/term_sum_controller.h
new file mode 100644
index 000000000..0acba1a81
--- /dev/null
+++ b/apps/sequence/graph/term_sum_controller.h
@@ -0,0 +1,59 @@
+#ifndef SEQUENCE_TERM_SUM_CONTROLLER_H
+#define SEQUENCE_TERM_SUM_CONTROLLER_H
+
+#include <escher.h>
+#include "graph_view.h"
+#include "curve_view_range.h"
+#include "vertical_cursor_view.h"
+#include "../../shared/curve_view_cursor.h"
+
+namespace Sequence {
+
+class TermSumController : public ViewController {
+public:
+  TermSumController(Responder * parentResponder, GraphView * graphView, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor);
+  const char * title() const override;
+  View * view() override;
+  void viewWillAppear() override;
+  bool handleEvent(Ion::Events::Event event) override;
+  bool moveCursorHorizontallyToPosition(int position);
+  void setSequence(Sequence * sequence);
+private:
+  constexpr static float k_cursorTopMarginRatio = 0.07f;   // (cursorHeight/2)/graphViewHeight
+  constexpr static float k_cursorRightMarginRatio = 0.04f; // (cursorWidth/2)/graphViewWidth
+  constexpr static float k_cursorBottomMarginRatio = 0.15f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
+  constexpr static float k_cursorLeftMarginRatio = 0.04f;  // (cursorWidth/2)/graphViewWidth
+  class ContentView : public View {
+  public:
+    ContentView(GraphView * graphView);
+    void layoutSubviews() override;
+    GraphView * graphView();
+  private:
+    class LegendView : public View {
+    public:
+      LegendView();
+      void drawRect(KDContext * ctx, KDRect rect) const override;
+    private:
+      void layoutSubviews() override;
+      int numberOfSubviews() const override;
+      View * subviewAtIndex(int index) override;
+      ExpressionView m_sum;
+      PointerTextView m_legend;
+    };
+    int numberOfSubviews() const override;
+    View * subviewAtIndex(int index) override;
+    GraphView * m_graphView;
+    LegendView m_legendView;
+    constexpr static KDCoordinate k_legendHeight = 28;
+  };
+  ContentView m_contentView;
+  CurveViewRange * m_graphRange;
+  Sequence * m_sequence;
+  Shared::CurveViewCursor * m_cursor;
+  VerticalCursorView m_cursorView;
+  int step;
+};
+
+}
+
+#endif