diff --git a/ui-ngx/src/app/core/api/entity-data-subscription.ts b/ui-ngx/src/app/core/api/entity-data-subscription.ts
index 0d6c534e4c..8032a32973 100644
--- a/ui-ngx/src/app/core/api/entity-data-subscription.ts
+++ b/ui-ngx/src/app/core/api/entity-data-subscription.ts
@@ -457,7 +457,7 @@ export class EntityDataSubscription {
     }
     this.prepareSubscriptionTimewindow();
 
-    this.prepareData();
+    this.prepareData(true);
 
     if (this.datasourceType === DatasourceType.entity) {
       this.subsCommand = new EntityDataCmd();
@@ -567,7 +567,7 @@ export class EntityDataSubscription {
     this.generateData(true);
   }
 
-  private prepareData() {
+  private prepareData(isUpdate: boolean) {
     if (this.timeseriesTimer) {
       clearTimeout(this.timeseriesTimer);
       this.timeseriesTimer = null;
@@ -641,11 +641,14 @@ export class EntityDataSubscription {
         for (let dataIndex = 0; dataIndex < this.pageData.data.length; dataIndex++) {
           this.onAggData(aggSubscriptionData, DataKeyType.timeseries, dataIndex, true,
             this.entityDataSubscriptionOptions.type === widgetType.timeseries, true,
-            (data1, dataIndex1, dataKeyIndex) => {
+            (data, dataIndex1, dataKeyIndex, detectChanges, isLatest) => {
               if (!this.data[dataIndex1]) {
                 this.data[dataIndex1] = [];
               }
-              this.data[dataIndex1][dataKeyIndex] = data1;
+              this.data[dataIndex1][dataKeyIndex] = data;
+              if (isUpdate) {
+                this.notifyListener(data, dataIndex1, dataKeyIndex, detectChanges, isLatest);
+              }
             });
         }
       }
@@ -706,7 +709,7 @@ export class EntityDataSubscription {
     this.pageData = pageData;
 
     if (this.entityDataSubscriptionOptions.isPaginatedDataSubscription) {
-      this.prepareData();
+      this.prepareData(false);
     } else if (isInitialData) {
       this.resetData();
     }
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.models.ts b/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.models.ts
index 595384abaf..78c9245614 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.models.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.models.ts
@@ -17,7 +17,7 @@
 // tslint:disable-next-line:no-reference
 /// <reference path="../../../../../../../src/typings/jquery.flot.typings.d.ts" />
 
-import { DataKey, Datasource, DatasourceData, JsonSettingsSchema } from '@shared/models/widget.models';
+import { DataKey, Datasource, DatasourceData, FormattedData, JsonSettingsSchema } from '@shared/models/widget.models';
 import { DataKeyType } from '@shared/models/telemetry/telemetry.models';
 import { ComparisonDuration } from '@shared/models/time/time.models';
 
@@ -25,7 +25,7 @@ export declare type ChartType = 'line' | 'pie' | 'bar' | 'state' | 'graph';
 
 export declare type TbFlotSettings = TbFlotBaseSettings & TbFlotGraphSettings & TbFlotBarSettings & TbFlotPieSettings;
 
-export declare type TooltipValueFormatFunction = (value: any) => string;
+export declare type TooltipValueFormatFunction = (value: any, latestData: FormattedData) => string;
 
 export declare type TbFlotTicksFormatterFunction = (t: number, a?: TbFlotPlotAxis) => string;
 
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.ts b/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.ts
index bf59e36804..c601df72d4 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/flot-widget.ts
@@ -18,7 +18,7 @@
 import { WidgetContext } from '@home/models/widget-component.models';
 import {
   createLabelFromDatasource,
-  deepClone,
+  deepClone, formattedDataFormDatasourceData,
   insertVariable,
   isDefined,
   isDefinedAndNotNull,
@@ -28,7 +28,14 @@ import {
   isUndefined
 } from '@app/core/utils';
 import { IWidgetSubscription, WidgetSubscriptionOptions } from '@core/api/widget-api.models';
-import { DataKey, Datasource, DatasourceData, DatasourceType, widgetType } from '@app/shared/models/widget.models';
+import {
+  DataKey,
+  Datasource,
+  DatasourceData,
+  DatasourceType,
+  FormattedData,
+  widgetType
+} from '@app/shared/models/widget.models';
 import {
   ChartType,
   TbFlotAxisOptions,
@@ -88,6 +95,8 @@ export class TbFlot {
   private latestDataThresholds: TbFlotThresholdMarking[];
   private attributesThresholds: TbFlotThresholdMarking[];
 
+  private latestData: FormattedData[];
+
   private labelPatternsSourcesSubscription: IWidgetSubscription;
   private labelPatternsSourcesData: DatasourceData[];
 
@@ -379,7 +388,7 @@ export class TbFlot {
     let tooltipValueFormatFunction: TooltipValueFormatFunction = null;
     if (this.settings.tooltipValueFormatter && this.settings.tooltipValueFormatter.length) {
       try {
-        tooltipValueFormatFunction = new Function('value', this.settings.tooltipValueFormatter) as TooltipValueFormatFunction;
+        tooltipValueFormatFunction = new Function('value', 'latestData', this.settings.tooltipValueFormatter) as TooltipValueFormatFunction;
       } catch (e) {
         tooltipValueFormatFunction = null;
       }
@@ -392,7 +401,7 @@ export class TbFlot {
       series.dataKey.tooltipValueFormatFunction = tooltipValueFormatFunction;
       if (keySettings.tooltipValueFormatter && keySettings.tooltipValueFormatter.length) {
         try {
-          series.dataKey.tooltipValueFormatFunction = new Function('value',
+          series.dataKey.tooltipValueFormatFunction = new Function('value', 'latestData',
             keySettings.tooltipValueFormatter) as TooltipValueFormatFunction;
         } catch (e) {
           series.dataKey.tooltipValueFormatFunction = tooltipValueFormatFunction;
@@ -546,6 +555,13 @@ export class TbFlot {
       }
       this.latestDataThresholds = this.thresholdsSourcesDataUpdated(allThresholds, this.subscription.latestData, true);
       this.options.grid.markings = allThresholds.concat(this.latestDataThresholds);
+      if (this.subscription.latestData) {
+        this.latestData = formattedDataFormDatasourceData(this.subscription.latestData);
+      } else {
+        this.latestData = [];
+      }
+    } else if (this.chartType === 'pie') {
+      this.latestData = formattedDataFormDatasourceData(this.subscription.data);
     }
 
     this.checkMouseEvents();
@@ -653,6 +669,7 @@ export class TbFlot {
             this.updateData();
           }
         } else if (this.chartType === 'pie') {
+          this.latestData = formattedDataFormDatasourceData(this.subscription.data);
           if (this.animatedPie) {
             this.nextPieDataAnimation(true);
           } else {
@@ -683,6 +700,11 @@ export class TbFlot {
             this.plot.getOptions().grid.markings = this.options.grid.markings;
             this.updateData();
           }
+          if (this.subscription.latestData) {
+            this.latestData = formattedDataFormDatasourceData(this.subscription.latestData);
+          } else {
+            this.latestData = [];
+          }
         }
       } else if (this.isMouseInteraction && this.plot) {
         this.latestUpdateTimeoutHandle = setTimeout(this.latestDataUpdate.bind(this), 30);
@@ -690,6 +712,14 @@ export class TbFlot {
     }
   }
 
+  private latestDataByDataIndex(index: number): FormattedData {
+    if (this.latestData[index]) {
+      return this.latestData[index];
+    } else {
+      return {} as FormattedData;
+    }
+  }
+
   private scalingPieRadius() {
       let scalingLine;
       this.ctx.width > this.ctx.height ? scalingLine = this.ctx.height : scalingLine = this.ctx.width;
@@ -1004,7 +1034,8 @@ export class TbFlot {
 
   private seriesInfoDiv(label: string, color: string, value: any,
                         units: string, trackDecimals: number, active: boolean,
-                        percent: number, valueFormatFunction: TooltipValueFormatFunction): JQuery<HTMLElement> {
+                        percent: number, seriesIndex: number,
+                        valueFormatFunction: TooltipValueFormatFunction): JQuery<HTMLElement> {
     const divElement = $('<div></div>');
     divElement.css({
       display: 'flex',
@@ -1034,7 +1065,7 @@ export class TbFlot {
     divElement.append(labelSpan);
     let valueContent: string;
     if (valueFormatFunction) {
-      valueContent = valueFormatFunction(value);
+      valueContent = valueFormatFunction(value, this.latestDataByDataIndex(seriesIndex));
     } else {
       valueContent = this.ctx.utils.formatValue(value, trackDecimals, units);
     }
@@ -1059,7 +1090,8 @@ export class TbFlot {
     const units = seriesHoverInfo.units && seriesHoverInfo.units.length ? seriesHoverInfo.units : this.trackUnits;
     const decimals = isDefinedAndNotNull(seriesHoverInfo.decimals) ? seriesHoverInfo.decimals : this.trackDecimals;
     const divElement = this.seriesInfoDiv(seriesHoverInfo.label, seriesHoverInfo.color,
-      seriesHoverInfo.value, units, decimals, seriesHoverInfo.index === seriesIndex, null, seriesHoverInfo.tooltipValueFormatFunction);
+      seriesHoverInfo.value, units, decimals, seriesHoverInfo.index === seriesIndex, null, seriesHoverInfo.index,
+      seriesHoverInfo.tooltipValueFormatFunction);
     return divElement.prop('outerHTML');
   }
 
@@ -1086,7 +1118,8 @@ export class TbFlot {
     const units = item.series.dataKey.units && item.series.dataKey.units.length ? item.series.dataKey.units : this.trackUnits;
     const decimals = isDefinedAndNotNull(item.series.dataKey.decimals) ? item.series.dataKey.decimals : this.trackDecimals;
     const divElement = this.seriesInfoDiv(item.series.dataKey.label, item.series.dataKey.color,
-      item.datapoint[1][0][1], units, decimals, true, item.series.percent, item.series.dataKey.tooltipValueFormatFunction);
+      item.datapoint[1][0][1], units, decimals, true, item.series.percent, 0,
+      item.series.dataKey.tooltipValueFormatFunction);
     return divElement.prop('outerHTML');
   }
 
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-key-settings.component.html b/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-key-settings.component.html
index 05879cb124..5741bfae9f 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-key-settings.component.html
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-key-settings.component.html
@@ -123,7 +123,7 @@
     <tb-js-func
       formControlName="tooltipValueFormatter"
       [globalVariables]="functionScopeVariables"
-      [functionArgs]="['value']"
+      [functionArgs]="['value', 'latestData']"
       functionTitle="{{ 'widgets.chart.tooltip-value-format-function' | translate }}"
       helpId="widget/lib/flot/tooltip_value_format_fn">
     </tb-js-func>
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-widget-settings.component.html b/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-widget-settings.component.html
index beebf38268..06b9bc5f86 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-widget-settings.component.html
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-widget-settings.component.html
@@ -96,7 +96,7 @@
           <tb-js-func
                       formControlName="tooltipValueFormatter"
                       [globalVariables]="functionScopeVariables"
-                      [functionArgs]="['value']"
+                      [functionArgs]="['value', 'latestData']"
                       functionTitle="{{ 'widgets.chart.tooltip-value-format-function' | translate }}"
                       helpId="widget/lib/flot/tooltip_value_format_fn">
           </tb-js-func>