diff --git a/src/AppConstants.ts b/src/AppConstants.ts
index 51a9614..2e726d0 100644
--- a/src/AppConstants.ts
+++ b/src/AppConstants.ts
@@ -88,6 +88,7 @@ export class AppConstants {
   static CELL_PRECISION = 'cellPrecision';
   static CELL_RECALL = 'cellRecall';
   static CELL_F1_SCORE = 'cellF1Score';
+  static CELL_OVERALL_ACCURACY_SCORE = 'overallPrecisionScore';
 
   /**
    * Initial size of a heatmap cells for the softmax stampx
diff --git a/src/ConfusionMatrix.ts b/src/ConfusionMatrix.ts
index bfb019b..58e6bb3 100644
--- a/src/ConfusionMatrix.ts
+++ b/src/ConfusionMatrix.ts
@@ -1,4 +1,4 @@
-import {IAppView} from './app';
+import {App, IAppView} from './app';
 import * as d3 from 'd3';
 import * as events from 'phovea_core/src/event';
 import {AppConstants} from './AppConstants';
@@ -14,7 +14,7 @@ import {ACell, LabelCell, MatrixCell, PanelCell} from './confusion_matrix_cell/C
 import {zip} from './utils';
 import * as confMeasures from './ConfusionMeasures';
 import {Language} from './language';
-import {SquareMatrix, max, Matrix} from './DataStructures';
+import {SquareMatrix, max, Matrix, matrixSum} from './DataStructures';
 import {
   DataStoreApplicationProperties, DataStoreSelectedRun, dataStoreTimelines, RenderMode
 } from './DataStore';
@@ -41,6 +41,7 @@ export class ConfusionMatrix implements IAppView {
   private f1ScoreColumn: ChartColumn;
   private classSizeColumn: ChartColumn;
   private $cells = null;
+  private $overallAccuracyCell: d3.Selection<any>;
 
   constructor(parent: Element) {
     this.$node = d3.select(parent)
@@ -129,6 +130,9 @@ export class ConfusionMatrix implements IAppView {
 
     const numBottomColumns = 1; // number of additional columns
     this.$node.style('--num-bottom-columns', numBottomColumns);
+
+    this.$overallAccuracyCell = this.$node.append('div').classed('overall', true)
+      .append('div').classed('cell', true);
   }
 
   private attachListeners() {
@@ -347,6 +351,7 @@ export class ConfusionMatrix implements IAppView {
     let dataPrecision = null;
     let dataRecall = null;
     let dataF1 = null;
+    let dataOverallAccuracy = null;
 
     let fpfnRendererProto: IMatrixRendererChain = null;
     let confMatrixRendererProto: IMatrixRendererChain = null;
@@ -362,6 +367,7 @@ export class ConfusionMatrix implements IAppView {
       dataPrecision = datasets.map((x) => confMeasures.calcEvolution(x.multiEpochData.map((y) => y.confusionData), confMeasures.PPV));
       dataRecall = datasets.map((x) => confMeasures.calcEvolution(x.multiEpochData.map((y) => y.confusionData), confMeasures.TPR));
       dataF1 = datasets.map((x) => confMeasures.calcEvolution(x.multiEpochData.map((y) => y.confusionData), confMeasures.F1));
+      dataOverallAccuracy = datasets.map((x) => confMeasures.calcOverallAccuracy(x.multiEpochData.map((y) => y.confusionData)));
       singleEpochIndex = data[1].heatcell.indexInMultiSelection;
 
       confMatrixRendererProto = {
@@ -408,6 +414,7 @@ export class ConfusionMatrix implements IAppView {
       dataPrecision = datasets.map((x) => confMeasures.calcEvolution(x.multiEpochData.map((y) => y.confusionData), confMeasures.PPV));
       dataRecall = datasets.map((x) => confMeasures.calcEvolution(x.multiEpochData.map((y) => y.confusionData), confMeasures.TPR));
       dataF1 = datasets.map((x) => confMeasures.calcEvolution(x.multiEpochData.map((y) => y.confusionData), confMeasures.F1));
+      dataOverallAccuracy = datasets.map((x) => confMeasures.calcOverallAccuracy(x.multiEpochData.map((y) => y.confusionData)));
       singleEpochIndex = null;
 
       confMatrixRendererProto = {
@@ -460,6 +467,7 @@ export class ConfusionMatrix implements IAppView {
     this.renderPrecisionColumn(dataPrecision, precRendererProto, datasets[0].labels, singleEpochIndex, datasets.map((x) => x.datasetColor));
     this.renderRecallColumn(dataRecall, precRendererProto, datasets[0].labels, singleEpochIndex, datasets.map((x) => x.datasetColor));
     this.renderF1ScoreColumn(dataF1, precRendererProto, datasets[0].labels, singleEpochIndex, datasets.map((x) => x.datasetColor));
+    this.renderOverallAccuracyCell(dataOverallAccuracy, precRendererProto, datasets[0].labels, singleEpochIndex, datasets.map((x) => x.datasetColor));
   }
 
   private renderConfMatrixCells() {
@@ -489,6 +497,18 @@ export class ConfusionMatrix implements IAppView {
       });
   }
 
+  renderOverallAccuracyCell(data: number[][], renderer: IMatrixRendererChain, labels: string[], singleEpochIndex: number[], colors: string[]) {
+    const maxVal = Math.max(...[].concat(...data));
+    const res = {
+      linecell: data.map((x, i) => [{values: x, valuesInPercent: x, max: maxVal, classLabel: null, color: colors[i]}]),
+      heatcell: {indexInMultiSelection: singleEpochIndex, counts: null, maxVal: 0, classLabels: null, colorValues: null}
+    };
+    const cell = new PanelCell(res, AppConstants.CELL_OVERALL_ACCURACY_SCORE);
+    cell.init(this.$overallAccuracyCell);
+    applyRendererChain(renderer, cell, renderer.diagonal);
+    cell.render();
+  }
+
   renderRecallColumn(data: Matrix<number[]>[], renderer: IMatrixRendererChain, labels: string[], singleEpochIndex: number[], colors: string[]) {
     const maxVal = Math.max(...data.map((x: Matrix<number[]>) => max(x, (d) => Math.max(...d))));
     let transformedData = data.map((x) => x.to1DArray());
diff --git a/src/ConfusionMeasures.ts b/src/ConfusionMeasures.ts
index baae797..1352b91 100644
--- a/src/ConfusionMeasures.ts
+++ b/src/ConfusionMeasures.ts
@@ -95,11 +95,25 @@ export function calcEvolution(matrices: NumberMatrix[], funct: (matrix: NumberMa
     const res = calcForMultipleClasses(m, funct);
     matrix.values.map((c, i) => c[0].push(res[i]));
   }
-
-  //const summedPercent = calcSummedPercent(matrices);
-  //matrix[order - 1][0] = summedPercent;
   return matrix;
 }
 
+export function calcOverallAccuracy(matrices: NumberMatrix[]): number[] {
+  return matrices.map((m) => calcSummedPercent1(m));
+}
+
+export function calcSummedPercent1(matrix: NumberMatrix) {
+  let tpSum = 0;
+  let classSizeSum = 0;
+  for(let i = 0; i < matrix.order(); i++) {
+    tpSum += TP(matrix, i);
+    classSizeSum += ClassSize(matrix, i);
+  }
+  if(classSizeSum === 0) {
+    return 0;
+  }
+  return tpSum / classSizeSum;
+}
+
 
 
diff --git a/src/confusion_matrix_cell/ACellRenderer.ts b/src/confusion_matrix_cell/ACellRenderer.ts
index dea2ca2..483e07e 100644
--- a/src/confusion_matrix_cell/ACellRenderer.ts
+++ b/src/confusion_matrix_cell/ACellRenderer.ts
@@ -398,7 +398,8 @@ export class AxisRenderer extends ACellRenderer {
 
     //todo these are magic constants: use a more sophisticated algo to solve this
     let tickFrequency = 1;
-    if (selectedRangesLength[largest] > 20) {
+    const stride = Number(values[1]) - Number(values[0]);
+    if (stride <= 5) {
       tickFrequency = 4;
     }
 
diff --git a/src/detail_view/DetailChart.ts b/src/detail_view/DetailChart.ts
index 5b293ec..af1784b 100644
--- a/src/detail_view/DetailChart.ts
+++ b/src/detail_view/DetailChart.ts
@@ -87,6 +87,8 @@ export class DetailChart {
         text = Language.F1_SCORE_Y_LABEL;
         text = text + ' ' + Language.FOR_CLASS + ' ';
         text += cell.data.linecell[0][0].classLabel;
+      } else if (cell.type === AppConstants.CELL_OVERALL_ACCURACY_SCORE) {
+        text = Language.OVERALL_ACCURACY;
       }
     }
     this.$header.text(text);
diff --git a/src/language.ts b/src/language.ts
index 5c3e054..9b0e6cc 100644
--- a/src/language.ts
+++ b/src/language.ts
@@ -23,7 +23,7 @@ export class Language {
   static PRECISION_Y_LABEL = 'Precision [%]';
   static RECALL_Y_LABEL = 'Recall [%]';
   static F1_SCORE_Y_LABEL = 'F1 Score [%]';
-  static OVERALL_PRECISION = 'Overall Precision';
+  static OVERALL_ACCURACY = 'Overall Accuracy';
   static FP_RATE = 'False Positive Rate';
   static FN_RATE = 'False Negative Rate';
   static FOR_CLASS = 'for class';
diff --git a/src/styles/_confusionmatrix.scss b/src/styles/_confusionmatrix.scss
index 784db2b..88ac40f 100644
--- a/src/styles/_confusionmatrix.scss
+++ b/src/styles/_confusionmatrix.scss
@@ -13,7 +13,7 @@
 
 .grid {
   display: grid;
-  grid-template-areas: ". . axis-top . ." ". . label-top . label-right" "axis-left label-left matrix . chart-right" ". . . . ." ". label-bottom chart-bottom . .";
+  grid-template-areas: ". . axis-top . ." ". . label-top . label-right" "axis-left label-left matrix . chart-right" ". . . . ." ". label-bottom chart-bottom . overall";
   grid-template-columns: 20px 45px auto 10px minmax(100px, 300px);
   grid-template-rows: 20px 45px auto 10px minmax(60px, 1fr);
 }
@@ -45,6 +45,13 @@
   }
 }
 
+.overall {
+  grid-area: overall;
+  position: relative;
+  display: grid;
+  grid-template-columns: repeat(var(--num-right-columns), 1fr);
+}
+
 .label-right {
   grid-area: label-right;
   background: $label-bg;
@@ -159,6 +166,7 @@
   }
 }
 
+.overall,
 .chart-right,
 .chart-bottom,
 .matrix {