diff --git a/apps/i18n.cpp b/apps/i18n.cpp
index 3d52f8be8..8ad332126 100644
--- a/apps/i18n.cpp
+++ b/apps/i18n.cpp
@@ -307,7 +307,7 @@ constexpr static char leftIntegralFirstLegend[] = {'P', '(', 'X', Ion::Charset::
 constexpr static char finiteIntegralLegend[] = {Ion::Charset::LessEqual, 'X', Ion::Charset::LessEqual, 0};
 
 
-const char * universalMessages[238] {
+const char * universalMessages[239] {
   "",
   "alpha",
   "ALPHA",
@@ -334,6 +334,7 @@ const char * universalMessages[238] {
   leftIntegralFirstLegend,
   ")=",
   finiteIntegralLegend,
+  "P(X=",
 
   " D: y=ax+b ",
 
diff --git a/apps/i18n.h b/apps/i18n.h
index 9d50ca64a..c5011f92e 100644
--- a/apps/i18n.h
+++ b/apps/i18n.h
@@ -288,6 +288,7 @@ namespace I18n {
     LeftIntegralFirstLegend,
     LeftIntegralSecondLegend,
     FiniteIntegralLegend,
+    DiscreteLegend,
 
     RegressionFormula,
 
diff --git a/apps/probability/Makefile b/apps/probability/Makefile
index b8b370c2f..73e90cc91 100644
--- a/apps/probability/Makefile
+++ b/apps/probability/Makefile
@@ -1,6 +1,7 @@
 app_objs += $(addprefix apps/probability/,\
   app.o\
   calculation/calculation.o\
+  calculation/discrete_calculation.o\
   calculation/left_integral_calculation.o\
   calculation/right_integral_calculation.o\
   calculation/finite_integral_calculation.o\
@@ -27,11 +28,13 @@ app_images += $(addprefix apps/probability/images/,\
   calcul1_icon.png\
   calcul2_icon.png\
   calcul3_icon.png\
+  calcul4_icon.png\
   exponential_icon.png\
   focused_binomial_icon.png\
   focused_calcul1_icon.png\
   focused_calcul2_icon.png\
   focused_calcul3_icon.png\
+  focused_calcul4_icon.png\
   focused_exponential_icon.png\
   focused_normal_icon.png\
   focused_poisson_icon.png\
diff --git a/apps/probability/calculation/calculation.cpp b/apps/probability/calculation/calculation.cpp
index 078b7d217..0c7fe0c26 100644
--- a/apps/probability/calculation/calculation.cpp
+++ b/apps/probability/calculation/calculation.cpp
@@ -14,6 +14,10 @@ void Calculation::setLaw(Law * law) {
   compute(0);
 }
 
+int Calculation::numberOfEditableParameters() {
+  return numberOfParameters();
+}
+
 float Calculation::lowerBound() {
   return -INFINITY;
 }
diff --git a/apps/probability/calculation/calculation.h b/apps/probability/calculation/calculation.h
index 32c0b24fa..55e0aaf7d 100644
--- a/apps/probability/calculation/calculation.h
+++ b/apps/probability/calculation/calculation.h
@@ -10,13 +10,15 @@ public:
   enum class Type : uint8_t{
     LeftIntegral,
     FiniteIntegral,
-    RightIntegral
+    RightIntegral,
+    Discrete,
   };
   Calculation();
   virtual ~Calculation() = default;
   virtual Type type() = 0;
   void setLaw(Law * law);
   virtual int numberOfParameters() = 0;
+  virtual int numberOfEditableParameters();
   virtual I18n::Message legendForParameterAtIndex(int index) = 0;
   virtual void setParameterAtIndex(float f, int index) = 0;
   virtual float parameterAtIndex(int index) = 0;
diff --git a/apps/probability/calculation/discrete_calculation.cpp b/apps/probability/calculation/discrete_calculation.cpp
new file mode 100644
index 000000000..4c5f1db4a
--- /dev/null
+++ b/apps/probability/calculation/discrete_calculation.cpp
@@ -0,0 +1,69 @@
+#include "discrete_calculation.h"
+#include <assert.h>
+#include <ion.h>
+#include <math.h>
+
+namespace Probability {
+
+DiscreteCalculation::DiscreteCalculation() :
+  Calculation(),
+  m_abscissa(0.0f),
+  m_result(0.0f)
+{
+  compute(0);
+}
+
+Calculation::Type DiscreteCalculation::type() {
+  return Type::Discrete;
+}
+
+int DiscreteCalculation::numberOfParameters() {
+  return 2;
+}
+
+int DiscreteCalculation::numberOfEditableParameters() {
+  return 1;
+}
+
+I18n::Message DiscreteCalculation::legendForParameterAtIndex(int index) {
+  assert(index >= 0 && index < 2);
+  if (index == 0) {
+    return I18n::Message::DiscreteLegend;
+  }
+  return I18n::Message::LeftIntegralSecondLegend;
+}
+
+void DiscreteCalculation::setParameterAtIndex(float f, int index) {
+  assert(index == 0);
+  float rf = roundf(f);
+  m_abscissa = rf;
+  compute(index);
+}
+
+
+float DiscreteCalculation::parameterAtIndex(int index) {
+  assert(index >= 0 && index < 2);
+  if (index == 0) {
+    return m_abscissa;
+  }
+  return m_result;
+}
+
+float DiscreteCalculation::lowerBound() {
+  return m_abscissa;
+}
+
+float DiscreteCalculation::upperBound() {
+  return m_abscissa;
+}
+
+void DiscreteCalculation::compute(int indexKnownElement) {
+  if (m_law == nullptr) {
+    return;
+  }
+  m_result = m_law->evaluateAtAbscissa(m_abscissa);
+  /* Results in probability application are rounder to 3 decimals */
+  m_result = roundf(m_result/k_precision)*k_precision;
+}
+
+}
diff --git a/apps/probability/calculation/discrete_calculation.h b/apps/probability/calculation/discrete_calculation.h
new file mode 100644
index 000000000..2aecf649b
--- /dev/null
+++ b/apps/probability/calculation/discrete_calculation.h
@@ -0,0 +1,27 @@
+#ifndef PROBABILITE_DISCRETE_CALCULATION_H
+#define PROBABILITE_DISCRETE_CALCULATION_H
+
+#include "calculation.h"
+
+namespace Probability {
+
+class DiscreteCalculation : public Calculation {
+public:
+  DiscreteCalculation();
+  Type type() override;
+  int numberOfParameters() override;
+  int numberOfEditableParameters() override;
+  I18n::Message legendForParameterAtIndex(int index) override;
+  void setParameterAtIndex(float f, int index) override;
+  float parameterAtIndex(int index) override;
+  float lowerBound() override;
+  float upperBound() override;
+private:
+  void compute(int indexKnownElement) override;
+  float m_abscissa;
+  float m_result;
+};
+
+}
+
+#endif
diff --git a/apps/probability/calculation/finite_integral_calculation.cpp b/apps/probability/calculation/finite_integral_calculation.cpp
index 1f7e3779e..faffc59a4 100644
--- a/apps/probability/calculation/finite_integral_calculation.cpp
+++ b/apps/probability/calculation/finite_integral_calculation.cpp
@@ -22,6 +22,10 @@ int FiniteIntegralCalculation::numberOfParameters() {
   return 3;
 }
 
+int FiniteIntegralCalculation::numberOfEditableParameters() {
+  return 2;
+}
+
 I18n::Message FiniteIntegralCalculation::legendForParameterAtIndex(int index) {
   assert(index >= 0 && index < 3);
   if (index == 0) {
diff --git a/apps/probability/calculation/finite_integral_calculation.h b/apps/probability/calculation/finite_integral_calculation.h
index 6e5b84200..2357cba95 100644
--- a/apps/probability/calculation/finite_integral_calculation.h
+++ b/apps/probability/calculation/finite_integral_calculation.h
@@ -10,6 +10,7 @@ public:
   FiniteIntegralCalculation();
   Type type() override;
   int numberOfParameters() override;
+  int numberOfEditableParameters() override;
   I18n::Message legendForParameterAtIndex(int index) override;
   void setParameterAtIndex(float f, int index) override;
   float parameterAtIndex(int index) override;
diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 3dbf356dc..f1f1b5ecb 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -2,6 +2,7 @@
 #include "../constant.h"
 #include "../apps_container.h"
 #include "app.h"
+#include "calculation/discrete_calculation.h"
 #include "calculation/left_integral_calculation.h"
 #include "calculation/right_integral_calculation.h"
 #include "calculation/finite_integral_calculation.h"
@@ -15,7 +16,7 @@ namespace Probability {
 CalculationController::ContentView::ContentView(Responder * parentResponder, CalculationController * calculationController, Calculation * calculation, Law * law) :
   m_titleView(KDText::FontSize::Small, I18n::Message::ComputeProbability, 0.5f, 0.5f, Palette::GreyDark, Palette::WallScreen),
   m_lawCurveView(law, calculation),
-  m_imageTableView(parentResponder, calculation, calculationController),
+  m_imageTableView(parentResponder, law, calculation, calculationController),
   m_draftTextBuffer{},
   m_calculation(calculation)
 {
@@ -102,6 +103,9 @@ void CalculationController::ContentView::layoutSubviews() {
 void CalculationController::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
   KDCoordinate titleHeight = KDText::stringSize("", KDText::FontSize::Small).height()+k_titleHeightMargin;
   ctx->fillRect(KDRect(0,titleHeight, bounds().width(), ImageTableView::k_oneCellWidth), KDColorWhite);
+  if (m_calculation->numberOfEditableParameters() == 0) {
+    return;
+  }
   KDSize charSize = KDText::stringSize(" ");
   KDCoordinate xCoordinate = ImageTableView::k_oneCellWidth + k_textWidthMargin;
   KDCoordinate numberOfCharacters = strlen(I18n::translate(m_calculation->legendForParameterAtIndex(0)));
@@ -109,6 +113,9 @@ void CalculationController::ContentView::drawRect(KDContext * ctx, KDRect rect)
 
   ctx->drawRect(KDRect(xCoordinate-ImageTableView::k_outline, titleHeight+ImageTableView::k_margin, k_textFieldWidth+ImageTableView::k_outline, ImageCell::k_height+ImageTableView::k_outline), Palette::GreyMiddle);
 
+  if (m_calculation->numberOfEditableParameters() < 2) {
+    return;
+  }
   xCoordinate += k_textFieldWidth + k_textWidthMargin;
   numberOfCharacters = strlen(I18n::translate(m_calculation->legendForParameterAtIndex(1)));
   xCoordinate += numberOfCharacters*charSize.width() + k_textWidthMargin;
@@ -167,6 +174,9 @@ void CalculationController::setCalculationAccordingToIndex(int index, bool force
     case 2:
       new(m_calculation) RightIntegralCalculation();
       break;
+    case 3:
+      new(m_calculation) DiscreteCalculation();
+      break;
     default:
      return;
   }
@@ -174,7 +184,7 @@ void CalculationController::setCalculationAccordingToIndex(int index, bool force
 }
 
 bool CalculationController::handleEvent(Ion::Events::Event event) {
-  if ((event == Ion::Events::Left && m_highlightedSubviewIndex > 0) || (event == Ion::Events::Right && m_highlightedSubviewIndex < ContentView::k_maxNumberOfEditableFields - 1)) {
+  if ((event == Ion::Events::Left && m_highlightedSubviewIndex > 0) || (event == Ion::Events::Right && m_highlightedSubviewIndex < m_calculation->numberOfEditableParameters())) {
     if (m_highlightedSubviewIndex == 0) {
       m_contentView.imageTableView()->select(false);
       m_contentView.imageTableView()->setHighlight(false);
@@ -202,7 +212,7 @@ bool CalculationController::handleEvent(Ion::Events::Event event) {
 }
 
 bool CalculationController::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
-  return (event == Ion::Events::Right && m_highlightedSubviewIndex < ContentView::k_maxNumberOfEditableFields - 1) || event == Ion::Events::Left || TextFieldDelegate::textFieldShouldFinishEditing(textField, event);
+  return (event == Ion::Events::Right && m_highlightedSubviewIndex < m_calculation->numberOfEditableParameters()) || event == Ion::Events::Left || TextFieldDelegate::textFieldShouldFinishEditing(textField, event);
 }
 
 bool CalculationController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
diff --git a/apps/probability/calculation_controller.h b/apps/probability/calculation_controller.h
index 7cb69cf73..12a3c7d21 100644
--- a/apps/probability/calculation_controller.h
+++ b/apps/probability/calculation_controller.h
@@ -38,8 +38,8 @@ private:
     ImageTableView * imageTableView();
     EditableTextCell * calculationCellAtIndex(int index);
     void willDisplayEditableCellAtIndex(int index);
-    constexpr static int k_maxNumberOfEditableFields = 3;
   private:
+    constexpr static int k_maxNumberOfEditableFields = 3;
     constexpr static KDCoordinate k_textFieldWidth = 50;
     constexpr static KDCoordinate k_textWidthMargin = 5;
     constexpr static KDCoordinate k_titleHeightMargin = 5;
diff --git a/apps/probability/image_table_view.cpp b/apps/probability/image_table_view.cpp
index e01797f80..b612adafb 100644
--- a/apps/probability/image_table_view.cpp
+++ b/apps/probability/image_table_view.cpp
@@ -4,9 +4,11 @@
 #include "images/calcul1_icon.h"
 #include "images/calcul2_icon.h"
 #include "images/calcul3_icon.h"
+#include "images/calcul4_icon.h"
 #include "images/focused_calcul1_icon.h"
 #include "images/focused_calcul2_icon.h"
 #include "images/focused_calcul3_icon.h"
+#include "images/focused_calcul4_icon.h"
 
 namespace Probability {
 
@@ -42,11 +44,12 @@ void ImageCell::setImage(const Image * image, const Image * focusedImage) {
   m_focusedIcon = focusedImage;
 }
 
-ImageTableView::ImageTableView(Responder * parentResponder, Calculation * calculation, CalculationController * calculationController) :
+ImageTableView::ImageTableView(Responder * parentResponder, Law * law, Calculation * calculation, CalculationController * calculationController) :
   View(),
   Responder(parentResponder),
   m_selectableTableView(this, this, 0, 0, 0, 0, 0, 0, this, nullptr, false, false),
   m_isSelected(false),
+  m_law(law),
   m_calculation(calculation),
   m_calculationController(calculationController)
 {
@@ -58,7 +61,7 @@ void ImageTableView::drawRect(KDContext * ctx, KDRect rect) const {
 }
 
 KDSize ImageTableView::minimalSizeForOptimalDisplay() const {
-  return KDSize(2*k_totalMargin+ImageCell::k_width, k_totalMargin+3*ImageCell::k_height);
+  return KDSize(2*k_totalMargin+ImageCell::k_width, k_totalMargin+k_numberOfImages*ImageCell::k_height);
 }
 
 void ImageTableView::didBecomeFirstResponder() {
@@ -110,6 +113,9 @@ void ImageTableView::setHighlight(bool highlight) {
 
 int ImageTableView::numberOfRows() {
   if (m_isSelected) {
+    if (m_law->isContinuous()) {
+      return k_numberOfImages-1;
+    }
     return k_numberOfImages;
   }
   return 1;
@@ -127,8 +133,8 @@ int ImageTableView::reusableCellCount() {
 
 void ImageTableView::willDisplayCellForIndex(HighlightCell * cell, int index) {
   ImageCell * myCell = (ImageCell *)cell;
-  const Image *  images[3] = {ImageStore::Calcul1Icon, ImageStore::Calcul2Icon, ImageStore::Calcul3Icon};
-  const Image * focusedImages[3] = {ImageStore::FocusedCalcul1Icon, ImageStore::FocusedCalcul2Icon, ImageStore::FocusedCalcul3Icon};
+  const Image *  images[k_numberOfImages] = {ImageStore::Calcul1Icon, ImageStore::Calcul2Icon, ImageStore::Calcul3Icon, ImageStore::Calcul4Icon};
+  const Image * focusedImages[k_numberOfImages] = {ImageStore::FocusedCalcul1Icon, ImageStore::FocusedCalcul2Icon, ImageStore::FocusedCalcul3Icon, ImageStore::FocusedCalcul4Icon};
   if (!m_isSelected) {
     myCell->setImage(images[(int)m_calculation->type()], focusedImages[(int)m_calculation->type()]);
   } else {
diff --git a/apps/probability/image_table_view.h b/apps/probability/image_table_view.h
index 7cc16e103..2266eb004 100644
--- a/apps/probability/image_table_view.h
+++ b/apps/probability/image_table_view.h
@@ -26,7 +26,7 @@ private:
 
 class ImageTableView : public View, public Responder, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  ImageTableView(Responder * parentResponder, Calculation * calculation, CalculationController * calculationController);
+  ImageTableView(Responder * parentResponder, Law * law, Calculation * calculation, CalculationController * calculationController);
   void drawRect(KDContext * ctx, KDRect rect) const override;
   KDSize minimalSizeForOptimalDisplay() const override;
   bool handleEvent(Ion::Events::Event event) override;
@@ -49,11 +49,12 @@ private:
   View * subviewAtIndex(int index) override;
   void layoutSubviews() override;
   void setCalculationAccordingToIndex(int index);
-  constexpr static int k_numberOfImages = 3;
+  constexpr static int k_numberOfImages = 4;
   ImageCell m_imageCells[k_numberOfImages];
   SelectableTableView m_selectableTableView;
   bool m_isSelected;
   int m_selectedIcon;
+  Law * m_law;
   Calculation * m_calculation;
   CalculationController * m_calculationController;
 };
diff --git a/apps/probability/images/calcul4_icon.png b/apps/probability/images/calcul4_icon.png
new file mode 100644
index 000000000..8040f094f
Binary files /dev/null and b/apps/probability/images/calcul4_icon.png differ
diff --git a/apps/probability/images/focused_calcul4_icon.png b/apps/probability/images/focused_calcul4_icon.png
new file mode 100644
index 000000000..a5e40e24e
Binary files /dev/null and b/apps/probability/images/focused_calcul4_icon.png differ