diff --git a/ui-ngx/src/app/core/api/widget-subscription.ts b/ui-ngx/src/app/core/api/widget-subscription.ts
index 68a03d53b2..2bf0048a3a 100644
--- a/ui-ngx/src/app/core/api/widget-subscription.ts
+++ b/ui-ngx/src/app/core/api/widget-subscription.ts
@@ -352,6 +352,7 @@ export class WidgetSubscription implements IWidgetSubscription {
             initDataSubscriptionSubject.complete();
           },
           (err) => {
+            this.notifyDataLoaded();
             initDataSubscriptionSubject.error(err);
           }
         );
@@ -368,7 +369,8 @@ export class WidgetSubscription implements IWidgetSubscription {
       const additionalDataKeys: DataKey[] = [];
       let datasourceAdditionalKeysNumber = 0;
       datasource.dataKeys.forEach((dataKey) => {
-        dataKey.hidden = false;
+        dataKey.hidden = dataKey.settings.hideDataByDefault ? true : false;
+        dataKey.inLegend = dataKey.settings.removeFromLegend ? false : true;
         dataKey.pattern = dataKey.label;
         if (this.comparisonEnabled && dataKey.settings.comparisonSettings && dataKey.settings.comparisonSettings.showValuesForComparison) {
           datasourceAdditionalKeysNumber++;
diff --git a/ui-ngx/src/app/modules/home/components/widget/legend.component.html b/ui-ngx/src/app/modules/home/components/widget/legend.component.html
index 901cdd7169..96e6438711 100644
--- a/ui-ngx/src/app/modules/home/components/widget/legend.component.html
+++ b/ui-ngx/src/app/modules/home/components/widget/legend.component.html
@@ -26,7 +26,7 @@
   </tr>
   </thead>
   <tbody>
-  <tr class="tb-legend-keys" *ngFor="let legendKey of legendData.keys" [ngClass]="{ 'tb-row-direction': isRowDirection }">
+  <tr class="tb-legend-keys" *ngFor="let legendKey of legendKeys()" [ngClass]="{ 'tb-row-direction': isRowDirection }">
     <td><span class="tb-legend-line" [ngStyle]="{backgroundColor: legendKey.dataKey.color}"></span></td>
     <td class="tb-legend-label"
         (click)="toggleHideData(legendKey.dataIndex)"
diff --git a/ui-ngx/src/app/modules/home/components/widget/legend.component.ts b/ui-ngx/src/app/modules/home/components/widget/legend.component.ts
index e0a44f5f9e..b47ba317c0 100644
--- a/ui-ngx/src/app/modules/home/components/widget/legend.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/legend.component.ts
@@ -15,7 +15,7 @@
 ///
 
 import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core';
-import { LegendConfig, LegendData, LegendDirection, LegendPosition } from '@shared/models/widget.models';
+import { LegendConfig, LegendData, LegendDirection, LegendKey, LegendPosition } from '@shared/models/widget.models';
 
 @Component({
   selector: 'tb-legend',
@@ -52,8 +52,15 @@ export class LegendComponent implements OnInit {
   }
 
   toggleHideData(index: number) {
-    this.legendData.keys[index].dataKey.hidden = !this.legendData.keys[index].dataKey.hidden;
-    this.legendKeyHiddenChange.emit(index);
+    if (!this.legendData.keys[index].dataKey.settings.disableDataHiding) {
+      this.legendData.keys[index].dataKey.hidden = !this.legendData.keys[index].dataKey.hidden;
+      this.legendKeyHiddenChange.emit(index);
+    }
+  }
+
+  legendKeys(): LegendKey[] {
+    return this.legendData.keys
+      .filter(legendKey => this.legendData.keys[legendKey.dataIndex].dataKey.inLegend);
   }
 
 }
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 1818e87ef0..def651d22b 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
@@ -160,6 +160,9 @@ export declare type TbFlotXAxisPosition = 'top' | 'bottom';
 
 export interface TbFlotKeySettings {
   excludeFromStacking: boolean;
+  hideDataByDefault: boolean;
+  disableDataHiding: boolean;
+  removeFromLegend: boolean;
   showLines: boolean;
   fillLines: boolean;
   showPoints: boolean;
@@ -612,6 +615,36 @@ export const flotPieSettingsSchema: JsonSettingsSchema = {
     ]
 };
 
+export const flotPieDatakeySettingsSchema: JsonSettingsSchema = {
+  schema: {
+    type: 'object',
+    title: 'DataKeySettings',
+    properties: {
+      hideDataByDefault: {
+        title: 'Data is hidden by default',
+        type: 'boolean',
+        default: false
+      },
+      disableDataHiding: {
+        title: 'Disable data hiding',
+        type: 'boolean',
+        default: false
+      },
+      removeFromLegend: {
+        title: 'Remove datakey from legend',
+        type: 'boolean',
+        default: false
+      }
+    },
+    required: []
+  },
+  form: [
+    'hideDataByDefault',
+    'disableDataHiding',
+    'removeFromLegend'
+  ]
+};
+
 export function flotDatakeySettingsSchema(defaultShowLines: boolean, chartType: ChartType): JsonSettingsSchema {
   const schema: JsonSettingsSchema = {
     schema: {
@@ -623,6 +656,21 @@ export function flotDatakeySettingsSchema(defaultShowLines: boolean, chartType:
           type: 'boolean',
           default: false
         },
+        hideDataByDefault: {
+          title: 'Data is hidden by default',
+          type: 'boolean',
+          default: false
+        },
+        disableDataHiding: {
+          title: 'Disable data hiding',
+          type: 'boolean',
+          default: false
+        },
+        removeFromLegend: {
+          title: 'Remove datakey from legend',
+          type: 'boolean',
+          default: false
+        },
         showLines: {
           title: 'Show lines',
           type: 'boolean',
@@ -711,6 +759,9 @@ export function flotDatakeySettingsSchema(defaultShowLines: boolean, chartType:
       required: ['showLines', 'fillLines', 'showPoints']
     },
     form: [
+      'hideDataByDefault',
+      'disableDataHiding',
+      'removeFromLegend',
       'excludeFromStacking',
       'showLines',
       'fillLines',
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 c042a8f5cf..292956b1b7 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
@@ -21,7 +21,7 @@ import { IWidgetSubscription } from '@core/api/widget-api.models';
 import { DatasourceData, JsonSettingsSchema } from '@app/shared/models/widget.models';
 import {
   ChartType,
-  flotDatakeySettingsSchema,
+  flotDatakeySettingsSchema, flotPieDatakeySettingsSchema,
   flotPieSettingsSchema,
   flotSettingsSchema,
   TbFlotAxisOptions,
@@ -47,6 +47,7 @@ const tinycolor = tinycolor_;
 const moment = moment_;
 
 const flotPieSettingsSchemaValue = flotPieSettingsSchema;
+const flotPieDatakeySettingsSchemaValue = flotPieDatakeySettingsSchema;
 
 export class TbFlot {
 
@@ -103,7 +104,7 @@ export class TbFlot {
   }
 
   static pieDatakeySettingsSchema(): JsonSettingsSchema {
-    return {};
+    return flotPieDatakeySettingsSchemaValue;
   }
 
   static settingsSchema(chartType: ChartType): JsonSettingsSchema {
@@ -814,12 +815,7 @@ export class TbFlot {
         return seriesHover.index === seriesIndex;
       });
       if (found && found.length) {
-        let timestamp: number;
-        if (!isNumber(hoverInfo[0].time) || (found[0].time < hoverInfo[0].time)) {
-          timestamp = parseInt(hoverInfo[1].time, 10);
-        } else {
-          timestamp = parseInt(hoverInfo[0].time, 10);
-        }
+        const timestamp = parseInt(found[0].time, 10);
         const date = moment(timestamp).format('YYYY-MM-DD HH:mm:ss');
         const dateDiv = $('<div>' + date + '</div>');
         dateDiv.css({
diff --git a/ui-ngx/src/app/shared/models/widget.models.ts b/ui-ngx/src/app/shared/models/widget.models.ts
index bfd3f23e9c..fb4ac3401d 100644
--- a/ui-ngx/src/app/shared/models/widget.models.ts
+++ b/ui-ngx/src/app/shared/models/widget.models.ts
@@ -231,6 +231,7 @@ export interface DataKey extends KeyInfo {
   settings?: any;
   usePostProcessing?: boolean;
   hidden?: boolean;
+  inLegend?: boolean;
   _hash?: number;
 }