diff --git a/pom.xml b/pom.xml
index 2560df3..a8f78ef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -326,6 +326,7 @@
 					<runTarget>${gwt.runTarget}</runTarget>
 					<hostedWebapp>${webappDirectory}</hostedWebapp>
 					<module>${gwt.module.name}</module>
+					<generateJsInteropExports>true</generateJsInteropExports>
 				</configuration>
 				<executions>
 					<execution>
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.java
index eb48576..0926ead 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.java
@@ -7,8 +7,10 @@ import javax.inject.Inject;
 
 import org.gcube.portlets.user.accountingdashboard.client.application.mainarea.report.chartjs.Chart;
 import org.gcube.portlets.user.accountingdashboard.client.resources.AppResources;
+import org.gcube.portlets.user.accountingdashboard.shared.data.RecordData;
 import org.gcube.portlets.user.accountingdashboard.shared.data.ReportData;
 import org.gcube.portlets.user.accountingdashboard.shared.data.ReportElementData;
+import org.gcube.portlets.user.accountingdashboard.shared.data.SeriesData;
 
 import com.google.gwt.uibinder.client.UiBinder;
 import com.google.gwt.uibinder.client.UiField;
@@ -39,16 +41,65 @@ public class ReportAreaView extends ViewWithUiHandlers<ReportAreaPresenter>
 		this.resources = resources;
 		init();
 		initWidget(uiBinder.createAndBindUi(this));
-		ReportData rData=new ReportData();
-		ArrayList<ReportElementData> elements=new ArrayList<>();
-		ReportElementData reportElementData=new ReportElementData();
-		reportElementData.setxAxis("XAxis");
-		reportElementData.setyAxis("YAxis");
-		reportElementData.setCategory("Category");
-		reportElementData.setLabel("Label");
-		elements.add(reportElementData);
-		rData.setElements(elements);
+
+		//
+		RecordData recordData1 = new RecordData();
+		recordData1.setX("Gennaio");
+		recordData1.setY(3d);
+
+		RecordData recordData2 = new RecordData();
+		recordData2.setX("Febbraio");
+		recordData2.setY(2d);
+
+		RecordData[] dataRow1 = new RecordData[2];
+		dataRow1[0] = recordData1;
+		dataRow1[1] = recordData2;
+
+		RecordData recordData3 = new RecordData();
+		recordData3.setX("Gennaio");
+		recordData3.setY(1d);
+
+		RecordData recordData4 = new RecordData();
+		recordData4.setX("Febbraio");
+		recordData4.setY(5d);
+
+		RecordData[] dataRow2 = new RecordData[2];
+		dataRow2[0] = recordData3;
+		dataRow2[1] = recordData4;
+
+		SeriesData seriesData1 = new SeriesData();
+		seriesData1.setLabel("Series1");
+		seriesData1.setDataRow(dataRow1);
+
+		SeriesData seriesData2 = new SeriesData();
+		seriesData2.setLabel("Series2");
+		seriesData2.setDataRow(dataRow2);
+
+		SeriesData[] serieses = new SeriesData[2];
+		serieses[0] = seriesData1;
+		serieses[1] = seriesData2;
+
+		ReportData rData = new ReportData();
+		ArrayList<ReportElementData> elements = new ArrayList<>();
 		
+		ReportElementData reportElementData1 = new ReportElementData();
+		reportElementData1.setxAxis("XAxis");
+		reportElementData1.setyAxis("YAxis");
+		reportElementData1.setCategory("Category");
+		reportElementData1.setLabel("Label1");
+		reportElementData1.setSerieses(serieses);
+		elements.add(reportElementData1);
+
+		ReportElementData reportElementData2 = new ReportElementData();
+		reportElementData2.setxAxis("XAxis");
+		reportElementData2.setyAxis("YAxis");
+		reportElementData2.setCategory("Category");
+		reportElementData2.setLabel("Label2");
+		reportElementData2.setSerieses(serieses);
+		elements.add(reportElementData2);
+
+		rData.setElements(elements);
+
 		displayReportData(rData);
 	}
 
@@ -56,23 +107,17 @@ public class ReportAreaView extends ViewWithUiHandlers<ReportAreaPresenter>
 
 	}
 
-	
 	/**
-	 * 						LABEL
-	 * 			|
-	 *			|		_
-	 *	yaxis	|	 _ | |
-	 * 			|	| || |_
-	 * 			|	| || | |	
-	 * 			---------------------------------------------------
-	 * 				
+	 * LABEL | | _ yaxis | _ | | | | || |_ | | || | |
+	 * ---------------------------------------------------
 	 * 
-	 * 					*Series_label1     *Series_label2    *Series_label3
 	 * 
-	 * 								xAxis
+	 * *Series_label1 *Series_label2 *Series_label3
+	 * 
+	 * xAxis
 	 * 
 	 */
-	
+
 	@Override
 	public void displayReportData(ReportData reportData) {
 		if (reportData == null) {
@@ -87,6 +132,4 @@ public class ReportAreaView extends ViewWithUiHandlers<ReportAreaPresenter>
 
 	}
 
-	
-
 }
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.ui.xml b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.ui.xml
index 23511da..321324f 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.ui.xml
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/ReportAreaView.ui.xml
@@ -10,6 +10,6 @@
 
 
 
-	<g:HTMLPanel ui:field="reportPanel"/>
+	<g:HTMLPanel styleName="{res.uiDataCss.uiDataReportPanel}" ui:field="reportPanel"/>
 	
 </ui:UiBinder>
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/chartjs/Chart.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/chartjs/Chart.java
index 0a65228..2cc1bbd 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/chartjs/Chart.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/application/mainarea/report/chartjs/Chart.java
@@ -16,19 +16,12 @@ public class Chart extends HTMLPanel {
 	private String name;
 	private ReportElementData reportElementData;
 
-	/*
-	 * Wraper Style max-height: 600px; min-height: 300px; height: 550px;
-	 * 
-	 * Canvas Style width: 100%; max-width: 1000px; min-width: 250px;
-	 * max-height: 100%; min-height: 300px;
-	 * 
-	 * 
-	 */
 	public Chart(AppResources resources, String name, ReportElementData reportElementData) {
-		super("<canvas id=" + name + " width='100%'></canvas>");
+		super("<canvas id=" + name + " class='" + resources.uiDataCss().uiDataChartCanvas() + "'></canvas>");
 		this.name = name;
 		this.reportElementData = reportElementData;
 		this.addStyleName(resources.uiDataCss().uiDataChartWrapper());
+
 		addAttachHandler(new AttachEvent.Handler() {
 
 			@Override
@@ -41,19 +34,6 @@ public class Chart extends HTMLPanel {
 		});
 	}
 
-	private String getLabel() {
-		return reportElementData.getLabel();
-	}
-
-	public String getCatgegory() {
-		return reportElementData.getCategory();
-	}
-
-	public String getXAxisLabel() {
-		return reportElementData.getxAxis();
-
-	}
-
 	public String getYAxisLabel() {
 		return reportElementData.getyAxis();
 
@@ -77,6 +57,18 @@ public class Chart extends HTMLPanel {
 
 	private native void drawChart() /*-{
 
+		function getRandomColor() {
+			var letters = '0123456789ABCDEF';
+			var color = '#';
+			for (var i = 0; i < 6; i++) {
+				color += letters[Math.floor(Math.random() * 16)];
+			}
+			return color;
+		}
+	
+		
+		
+
 		var name = this.@org.gcube.portlets.user.accountingdashboard.client.application.mainarea.report.chartjs.Chart::name;
 		console.log('Element name: ' + name);
 		var element = this;
@@ -84,32 +76,59 @@ public class Chart extends HTMLPanel {
 		var canvas = $doc.getElementById(name);
 		console.log('Canvas: ' + canvas);
 
-		var color = Chart.helpers.color;
-		console.log('Color: ' + color);
-		var barChartData = {
-			labels : [ 'January', 'February', 'March', 'April', 'May', 'June',
-					'July' ],
-			datasets : [ {
-				label : 'Dataset 1',
-				backgroundColor : 'rgba(255,0,0,0.9)',
-				borderColor : 'rgba(255,0,0,1)',
-				borderWidth : 1,
-				data : [ 1, 2, 3, 1, 2, 3, 4 ]
-			}, {
-				label : 'Dataset 2',
-				backgroundColor : 'rgba(0,0,255,0.9)',
-				borderColor : 'rgba(0,0,255,1)',
-				borderWidth : 1,
-				data : [ 3, 4, 1, 2, 1, 2, 1 ]
-			} ]
+		var recordData = new $wnd.org.gcube.portlets.user.accountingdashboard.shared.data.RecordData();
+		recordData.setX('ok');
+		recordData.setY(1.0);
+		console.log('RecordData: ' + recordData.toString());
 
+		var reportElementData = this.@org.gcube.portlets.user.accountingdashboard.client.application.mainarea.report.chartjs.Chart::reportElementData;
+		console.log('ReportElementData: ' + reportElementData);
+
+		var serieses = reportElementData.getSerieses();
+		console.log('Serieses: '+serieses);
+		var seriesesLen = serieses.length;
+		console.log('Serieses lenght: ' + seriesesLen);
+
+		var datasetsArray = [];
+		for (var i = 0; i < seriesesLen; i++) {
+			console.log("for");
+			var seriesData = serieses[i];
+			console.log('SeriesData: ' + seriesData);
+			var dataRow = seriesData.getDataRow();
+			var dataRowLen = dataRow.length;
+
+			var dataArray = [];
+			for (var j = 0; j < dataRowLen; j++) {
+				var recordData = dataRow[j];
+				var recordData = dataArray.push(recordData.getY());
+
+			}
+		
+			var colorChart=getRandomColor();
+			console.log('Color: '+colorChart);
+			//	backgroundColor : 'rgba(255,0,0,0.9)',
+			//	borderColor : 'rgba(255,0,0,1)',
+				
+			datasetsArray.push({
+				label : seriesData.getLabel(),
+				backgroundColor : colorChart,
+				borderColor : colorChart,
+				borderWidth : 1,
+				data : dataArray
+			});
+		}
+
+		//var color = Chart.helpers.color;
+		//console.log('Color: ' + color);
+		
+		var barChartData = {
+			labels : [ 'January', 'February' ],
+			datasets : datasetsArray
 		};
 
-		var label = this.@org.gcube.portlets.user.accountingdashboard.client.application.mainarea.report.chartjs.Chart::getLabel()();
-
-		var xAxisLabel = this.@org.gcube.portlets.user.accountingdashboard.client.application.mainarea.report.chartjs.Chart::getXAxisLabel()();
-
-		var yAxisLabel = this.@org.gcube.portlets.user.accountingdashboard.client.application.mainarea.report.chartjs.Chart::getYAxisLabel()();
+		var label = reportElementData.getLabel();
+		var xAxisLabel = reportElementData.getxAxis();
+		var yAxisLabel = reportElementData.getyAxis();
 
 		var ctx = canvas.getContext('2d');
 		var chart = new Chart(ctx, {
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/AppResources.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/AppResources.java
index 1e249e6..d7b7014 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/AppResources.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/AppResources.java
@@ -12,63 +12,74 @@ import com.google.gwt.resources.client.TextResource;
  */
 public interface AppResources extends ClientBundle {
 
-	
-
 	interface uiDataCss extends CssResource {
-		String uiDataBody();
+
 		String uiDataMainPanel();
-		String uiDataLabel();
-		String uiDataLabelKeyTag(); 
-		String uiDataLabelGeoAreaTag(); 
+
 		String uiDataParagraphCentered();
-		String uiDataActionParagraph();
-		String uiDataAccordionGroup();
+
 		String uiDataFiltersPanel();
+
 		String uiDataFiltersPeriodPanel();
+
 		String uiDataFiltersExplorePanel();
+
 		String uiDataFiltersTitle();
+
 		String uiDataFiltersFormPanel();
+
 		String uiDataFiltersControls();
+
 		String uiDataExploreTree();
+
+		String uiDataReportPanel();
+
 		String uiDataChartWrapper();
-		
-		String uiDataButtonRefresh();
-		String uiDataIconRefresh();
-		String uiDataMainDataPanel();
-		String uiDataRow();
-		String uiDataTable();
-		String uiDataTableStriped();
-		String uiDataPager();
-		String uiDataDataTable();
-		String uiDataDataFirstTr();
-		String uiDataDataFirstTdHead();
-		String uiDataDataFirstTd();
-		String uiDataDataTr();
-		String uiDataDataTdHead();
-		String uiDataDataTd();
-		String uiDataDataUl();
-		String uiDataDataLi(); 
-		String uiDataSmallDataTable();
-		String uiDataSmallDataTh();
-		String uiDataSmallDataTd();
-		String uiDataNoMarginTable();
-		String uiDataMarginBottomFixedTable();
-		String uiDataTh();
-		String uiDataColumnCentered();
+
+		String uiDataChartCanvas();
+
 		String uiDataMonitorPopup();
+
 		String uiDataMonitorPopupGlass();
+
 		String uiDataMonitorPopupProgress();
+
 		String uiDataPopup();
+
 		String uiDataPopupGlass();
-		String uiDataFormTable();
-		String uiDataFormPager();
-		
+
+		//String uiDataFormTable();
+
+		//String uiDataFormPager();
+
+		// String uiDataActionParagraph();
+		// String uiDataAccordionGroup();
+
+		// String uiDataBody();
+		// String uiDataLabel();
+		// String uiDataLabelKeyTag();
+		// String uiDataLabelGeoAreaTag();
+
+		/*
+		 * String uiDataButtonRefresh(); String uiDataIconRefresh(); String
+		 * uiDataMainDataPanel(); String uiDataRow(); String uiDataTable();
+		 * String uiDataTableStriped(); String uiDataPager(); String
+		 * uiDataDataTable(); String uiDataDataFirstTr(); String
+		 * uiDataDataFirstTdHead(); String uiDataDataFirstTd(); String
+		 * uiDataDataTr(); String uiDataDataTdHead(); String uiDataDataTd();
+		 * String uiDataDataUl(); String uiDataDataLi(); String
+		 * uiDataSmallDataTable(); String uiDataSmallDataTh(); String
+		 * uiDataSmallDataTd(); String uiDataNoMarginTable(); String
+		 * uiDataMarginBottomFixedTable(); String uiDataTh(); String
+		 * uiDataColumnCentered();
+		 */
+
 	}
 
 	@Source("uiData.css")
 	uiDataCss uiDataCss();
-	
-    @Source("Chart.bundle.js")
-    TextResource chartJS();
+
+	@Source("Chart.bundle.js")
+	TextResource chartJS();
 
 }
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/uiData.css b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/uiData.css
index 18ec4b2..adeeb5f 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/uiData.css
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/client/resources/uiData.css
@@ -1,62 +1,12 @@
 /* Style */
-.uiDataBody {
-	padding-top: 0px;
-}
-
 .uiDataMainPanel {
 	background-color: white;
 }
 
-.uiDataLabel {
-	word-wrap: break-word;
-}
-
-.uiDataLabelKeyTag {
-	color: white;
-	font-weight: bold;
-	background-color: #00ace2;
-	border-radius: 8px;
-	padding: 3px;
-	margin: 2px;
-	width: auto;
-	display: inline-block;
-	word-wrap: break-word;
-}
-
-.uiDataLabelGeoAreaTag {
-	color: white;
-	font-weight: bold;
-	background-color: #009688;
-	border-radius: 8px;
-	padding: 3px;
-	margin: 2px;
-	width: auto;
-	display: inline-block;
-	word-wrap: break-word;
-}
-
 .uiDataParagraphCentered {
 	text-align: center;
 }
 
-.uiDataActionParagraph {
-	padding: 19px 20px 20px;
-	margin-top: 20px;
-	margin-bottom: 20px;
-	background-color: #f5f5f5;
-	border-top: 1px solid #e5e5e5;
-}
-
-.uiDataAccordionGroup {
-	margin-bottom: 2px;
-	padding-left: 10px;
-	border-width: 1px;
-	border-style: solid;
-	border-color: rgb(229, 229, 229);
-	border-image: initial;
-	border-radius: 4px;
-}
-
 .uiDataFiltersPanel {
 	float: left;
 	margin-right: 10px;
@@ -98,6 +48,112 @@
 	
 }
 
+/* Report*/
+.uiDataReportPanel {
+	/*float: left;*/ /*display: block;*/
+	
+}
+
+/* Chart */
+.uiDataChartWrapper {
+	/*max-width:100%;*/
+	
+}
+
+.uiDataChartCanvas {
+	/*width: 100%;*/ /*min-width: 250px;*/ /*height: 100%;*/
+	/*min-height: 300px;*/
+	
+}
+
+/* Monitor Dialog */
+.uiDataMonitorPopup {
+	background-color: white;
+	border: 1px double black;
+	padding: 0 15px;
+	z-index: 1070;
+}
+
+.uiDataMonitorPopupGlass {
+	background-color: #333333;
+	opacity: 0.5;
+	clip: rect(auto, auto, auto, auto);
+	z-index: 1050;
+}
+
+.uiDataMonitorPopupProgress {
+	margin: 5px;
+	height: 20px;
+}
+
+/* Dialog */
+.uiDataPopup {
+	background-color: white;
+	border: 1px double black;
+	padding: 0 15px;
+	z-index: 1070;
+}
+
+.uiDataPopupGlass {
+	background-color: #333333;
+	opacity: 0.5;
+	clip: rect(auto, auto, auto, auto);
+	z-index: 1050;
+}
+
+/*
+.uiDataBody {
+	padding-top: 0px;
+}
+
+
+.uiDataLabel {
+	word-wrap: break-word;
+}
+
+.uiDataLabelKeyTag {
+	color: white;
+	font-weight: bold;
+	background-color: #00ace2;
+	border-radius: 8px;
+	padding: 3px;
+	margin: 2px;
+	width: auto;
+	display: inline-block;
+	word-wrap: break-word;
+}
+
+.uiDataLabelGeoAreaTag {
+	color: white;
+	font-weight: bold;
+	background-color: #009688;
+	border-radius: 8px;
+	padding: 3px;
+	margin: 2px;
+	width: auto;
+	display: inline-block;
+	word-wrap: break-word;
+}
+
+.uiDataActionParagraph {
+	padding: 19px 20px 20px;
+	margin-top: 20px;
+	margin-bottom: 20px;
+	background-color: #f5f5f5;
+	border-top: 1px solid #e5e5e5;
+}
+
+.uiDataAccordionGroup {
+	margin-bottom: 2px;
+	padding-left: 10px;
+	border-width: 1px;
+	border-style: solid;
+	border-color: rgb(229, 229, 229);
+	border-image: initial;
+	border-radius: 4px;
+}
+
+
 .uiDataMainDataPanel {
 	float: left;
 	max-width: 800px;
@@ -194,7 +250,7 @@
 .uiDataDataFirstTdHead {
 	text-align: left;
 	font-weight: normal;
-	/*font-weight: bold;*/
+	
 	background-color: #b3e5fc;
 	width: 100px;
 }
@@ -204,28 +260,26 @@
 }
 
 .uiDataDataTr {
-	/*background-color: white;*/
+	
 	
 }
 
 .uiDataDataTdHead {
 	text-align: left;
 	font-weight: normal;
-	/*font-weight: bold;*/ /* background-color: white; */
 	width: 100px;
 }
 
 .uiDataDataTd {
-	/*background-color: white; */
+	
 	
 }
 
 .uiDataSmallDataTable, .uiDataSmallDataTh, .uiDataSmallDataTd {
 	border-width: 1px;
 	border-style: groove;
-	/*border-color: #FFEB3B;*/
 	border-collapse: collapse;
-	/*background-color: #FFEB3B;*/
+	
 }
 
 .uiDataDataUl {
@@ -258,43 +312,4 @@
 	display: block !important;
 }
 
-/* Chart */
-.uiDataChartWrapper {
-	height: 500px !important;
-}
-
-
-/* Monitor Dialog */
-.uiDataMonitorPopup {
-	background-color: white;
-	border: 1px double black;
-	padding: 0 15px;
-	z-index: 1070;
-}
-
-.uiDataMonitorPopupGlass {
-	background-color: #333333;
-	opacity: 0.5;
-	clip: rect(auto, auto, auto, auto);
-	z-index: 1050;
-}
-
-.uiDataMonitorPopupProgress {
-	margin: 5px;
-	height: 20px;
-}
-
-/* Dialog */
-.uiDataPopup {
-	background-color: white;
-	border: 1px double black;
-	padding: 0 15px;
-	z-index: 1070;
-}
-
-.uiDataPopupGlass {
-	background-color: #333333;
-	opacity: 0.5;
-	clip: rect(auto, auto, auto, auto);
-	z-index: 1050;
-}
\ No newline at end of file
+*/
\ No newline at end of file
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/server/AccountingDashboardServiceImpl.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/server/AccountingDashboardServiceImpl.java
index c4022e6..3595e72 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/server/AccountingDashboardServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/server/AccountingDashboardServiceImpl.java
@@ -73,7 +73,7 @@ public class AccountingDashboardServiceImpl extends RemoteServiceServlet impleme
 			if (Constants.DEBUG_MODE) {
 				as = new AccountingService(AccountingServiceType.CurrentScope);
 			} else {
-				as = new AccountingService(AccountingServiceType.PortalContex);
+				as = new AccountingService(AccountingServiceType.CurrentScope);
 			}
 
 			ScopeData scopeData = as.getTree(this.getThreadLocalRequest());
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/server/accounting/ReportDataBuilder.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/server/accounting/ReportDataBuilder.java
index 3b55922..04095d0 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/server/accounting/ReportDataBuilder.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/server/accounting/ReportDataBuilder.java
@@ -36,27 +36,48 @@ public class ReportDataBuilder {
 		ArrayList<ReportElementData> elements = new ArrayList<>();
 		for (ReportElement reportElement : report.getElements()) {
 			if (reportElement.getSerieses() == null) {
-				ReportElementData reportElementData = new ReportElementData(reportElement.getLabel(),
-						reportElement.getCategory(), reportElement.getXAxis(), reportElement.getYAxis(), null);
+				ReportElementData reportElementData = new ReportElementData();
+				reportElementData.setLabel(reportElement.getLabel());
+				reportElementData.setCategory(reportElement.getCategory());
+				reportElementData.setxAxis(reportElement.getXAxis());
+				reportElementData.setyAxis(reportElement.getYAxis());
+				reportElementData.setSerieses(null);
 				elements.add(reportElementData);
 			} else {
-				ArrayList<SeriesData> serieses = new ArrayList<>();
-				for (Series series : reportElement.getSerieses()) {
+
+				Series[] serieses = reportElement.getSerieses();
+				int seriesLen = serieses.length;
+				SeriesData[] seriesesData = new SeriesData[seriesLen];
+				for (int i = 0; i < seriesLen; i++) {
+					Series series = serieses[i];
 					SeriesData seriesData = null;
 					if (series.getDataRow() == null) {
-						seriesData = new SeriesData(series.getLabel(), null);
+						seriesData = new SeriesData();
+						seriesData.setLabel(series.getLabel());
+						seriesData.setDataRow(null);
 					} else {
-						ArrayList<RecordData> dataRow = new ArrayList<>();
-						for (Record record : series.getDataRow()) {
-							RecordData recordData = new RecordData(record.getX(), record.getY());
-							dataRow.add(recordData);
+						Record[] dataRow = series.getDataRow();
+						int dataRowLen = dataRow.length;
+						RecordData[] dataRowData = new RecordData[dataRowLen];
+						for (int j = 0; j < dataRowLen; j++) {
+							Record record = dataRow[j];
+							RecordData recordData = new RecordData();
+							recordData.setX(record.getX());
+							recordData.setY(record.getY());
+							dataRowData[j] = recordData;
 						}
-						seriesData = new SeriesData(series.getLabel(), dataRow);
+						seriesData = new SeriesData();
+						seriesData.setLabel(series.getLabel());
+						seriesData.setDataRow(dataRowData);
 					}
-					serieses.add(seriesData);
+					seriesesData[i] = seriesData;
 				}
-				ReportElementData reportElementData = new ReportElementData(reportElement.getLabel(),
-						reportElement.getCategory(), reportElement.getXAxis(), reportElement.getYAxis(), serieses);
+				ReportElementData reportElementData = new ReportElementData();
+				reportElementData.setLabel(reportElement.getLabel());
+				reportElementData.setCategory(reportElement.getCategory());
+				reportElementData.setxAxis(reportElement.getXAxis());
+				reportElementData.setyAxis(reportElement.getYAxis());
+				reportElementData.setSerieses(seriesesData);
 				elements.add(reportElementData);
 			}
 		}
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/RecordData.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/RecordData.java
index 124201e..e4d611b 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/RecordData.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/RecordData.java
@@ -2,27 +2,24 @@ package org.gcube.portlets.user.accountingdashboard.shared.data;
 
 import java.io.Serializable;
 
+import jsinterop.annotations.JsType;
+
 /**
  * 
  * @author Giancarlo Panichi
  *
  */
+@JsType
 public class RecordData implements Serializable {
 
 	private static final long serialVersionUID = -7526935477801214643L;
 	private String x;
-	private Long y;
+	private double y;
 
 	public RecordData() {
 		super();
 	}
 
-	public RecordData(String x, Long y) {
-		super();
-		this.x = x;
-		this.y = y;
-	}
-
 	public String getX() {
 		return x;
 	}
@@ -31,11 +28,11 @@ public class RecordData implements Serializable {
 		this.x = x;
 	}
 
-	public Long getY() {
+	public double getY() {
 		return y;
 	}
 
-	public void setY(Long y) {
+	public void setY(double y) {
 		this.y = y;
 	}
 
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/ReportElementData.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/ReportElementData.java
index 4f96aa7..c3448d6 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/ReportElementData.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/ReportElementData.java
@@ -1,13 +1,15 @@
 package org.gcube.portlets.user.accountingdashboard.shared.data;
 
 import java.io.Serializable;
-import java.util.ArrayList;
+
+import jsinterop.annotations.JsType;
 
 /**
  * 
  * @author Giancarlo Panichi
  *
  */
+@JsType
 public class ReportElementData implements Serializable {
 
 	private static final long serialVersionUID = -4942929709611742287L;
@@ -16,22 +18,12 @@ public class ReportElementData implements Serializable {
 	private String xAxis;
 	private String yAxis;
 
-	private ArrayList<SeriesData> serieses;
+	private SeriesData[] serieses;
 
 	public ReportElementData() {
 		super();
 	}
 
-	public ReportElementData(String label, String category, String xAxis, String yAxis,
-			ArrayList<SeriesData> serieses) {
-		super();
-		this.label = label;
-		this.category = category;
-		this.xAxis = xAxis;
-		this.yAxis = yAxis;
-		this.serieses = serieses;
-	}
-
 	public String getLabel() {
 		return label;
 	}
@@ -64,11 +56,11 @@ public class ReportElementData implements Serializable {
 		this.yAxis = yAxis;
 	}
 
-	public ArrayList<SeriesData> getSerieses() {
+	public SeriesData[] getSerieses() {
 		return serieses;
 	}
 
-	public void setSerieses(ArrayList<SeriesData> serieses) {
+	public void setSerieses(SeriesData[] serieses) {
 		this.serieses = serieses;
 	}
 
diff --git a/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/SeriesData.java b/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/SeriesData.java
index 94b8d78..c92e19a 100644
--- a/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/SeriesData.java
+++ b/src/main/java/org/gcube/portlets/user/accountingdashboard/shared/data/SeriesData.java
@@ -1,29 +1,25 @@
 package org.gcube.portlets.user.accountingdashboard.shared.data;
 
 import java.io.Serializable;
-import java.util.ArrayList;
+
+import jsinterop.annotations.JsType;
 
 /**
  * 
  * @author Giancarlo Panichi
  *
  */
+@JsType
 public class SeriesData implements Serializable {
 
 	private static final long serialVersionUID = 3308676516412447011L;
 	private String label;
-	private ArrayList<RecordData> dataRow;
+	private RecordData[] dataRow;
 
 	public SeriesData() {
 		super();
 	}
 
-	public SeriesData(String label, ArrayList<RecordData> dataRow) {
-		super();
-		this.label = label;
-		this.dataRow = dataRow;
-	}
-
 	public String getLabel() {
 		return label;
 	}
@@ -32,11 +28,11 @@ public class SeriesData implements Serializable {
 		this.label = label;
 	}
 
-	public ArrayList<RecordData> getDataRow() {
+	public RecordData[] getDataRow() {
 		return dataRow;
 	}
 
-	public void setDataRow(ArrayList<RecordData> dataRow) {
+	public void setDataRow(RecordData[] dataRow) {
 		this.dataRow = dataRow;
 	}