diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/UpdateMetricAlert.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/UpdateMetricAlert.json
index f99acfe16e6b..627786075af7 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/UpdateMetricAlert.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/UpdateMetricAlert.json
@@ -19,6 +19,7 @@
           "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
           "allOf": [
             {
+              "criterionType":"StaticThresholdCriterion",
               "name": "High_CPU_80",
               "metricName": "\\Processor(_Total)\\% Processor Time",
               "dimensions": [
@@ -65,6 +66,7 @@
             "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
             "allOf": [
               {
+                "criterionType":"StaticThresholdCriterion",
                 "name": "High_CPU_80",
                 "metricName": "\\Processor(_Total)\\% Processor Time",
                 "dimensions": [
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateDynamicMetricAlertMultipleResource.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateDynamicMetricAlertMultipleResource.json
new file mode 100644
index 000000000000..35e8264e7de9
--- /dev/null
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateDynamicMetricAlertMultipleResource.json
@@ -0,0 +1,109 @@
+{
+    "parameters": {
+      "subscriptionId": "00000000-0000-0000-0000-000000000000",
+      "resourceGroupName": "gigtest",
+      "ruleName": "MetricAlertOnMultipleResources",
+      "api-version": "2018-03-01",
+      "parameters": {
+        "location": "global",
+        "tags": {},
+        "properties": {
+          "description": "This is the description of the rule1",
+          "severity": 3,
+          "enabled": true,
+          "scopes": [
+            "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme1",
+            "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme2"
+          ],
+          "evaluationFrequency": "PT1M",
+          "windowSize": "PT15M",
+          "targetResourceType":"Microsoft.Compute/virtualMachines",
+          "targetResourceRegion":"southcentralus",
+          "criteria": {
+            "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+            "allOf": [
+              {
+                "criterionType": "DynamicThresholdCriterion",
+                "name": "High_CPU_80",
+                "metricName": "Percentage CPU",
+                "metricNamespace": "microsoft.compute/virtualmachines",
+                "operator": "GreaterOrLessThan",
+                "timeAggregation": "Average",
+                "dimensions": [],
+                "alertSensitivity": "Medium",
+                "failingPeriods": {
+                    "numberOfEvaluationPeriods": 4,
+                    "minFailingPeriodsToAlert": 4
+                }
+              }
+            ]
+          },
+          "autoMitigate": false,
+          "actions": [
+            {
+              "actionGroupId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/gigtest/providers/microsoft.insights/notificationgroups/group2",
+              "webhookProperties": {
+                "key11": "value11",
+                "key12": "value12"
+              }
+            }
+          ]
+        }
+      }
+    },
+    "responses": {
+      "200": {
+        "headers": {},
+        "body": {
+          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/providers/microsoft.insights/metricalerts/MetricAlertOnMultipleResources",
+          "type": "Microsoft.Insights/metricAlerts",
+          "location": "global",
+          "tags": {
+            "hidden-link:/subscriptions/b67f7fec-69fc-4974-9099-a26bd6ffeda3/resourceGroups/Rac46PostSwapRG/providers/Microsoft.Web/sites/leoalerttest": "Resource"
+          },
+          "properties": {
+            "description": "This is the description of the rule1",
+            "severity": 3,
+            "enabled": true,
+            "scopes": [
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme1",
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme2"
+            ],
+            "evaluationFrequency": "PT1M",
+            "windowSize": "PT15M",
+            "targetResourceType":"Microsoft.Compute/virtualMachines",
+            "targetResourceRegion":"southcentralus",
+            "criteria": {
+              "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+              "allOf": [
+                {
+                    "criterionType": "DynamicThresholdCriterion",
+                    "name": "High_CPU_80",
+                    "metricName": "Percentage CPU",
+                    "metricNamespace": "microsoft.compute/virtualmachines",
+                    "operator": "GreaterOrLessThan",
+                    "timeAggregation": "Average",
+                    "dimensions": [],
+                    "alertSensitivity": "Medium",
+                    "failingPeriods": {
+                        "numberOfEvaluationPeriods": 4,
+                        "minFailingPeriodsToAlert": 4
+                    }
+                }
+              ]
+            },
+            "autoMitigate":false,
+            "actions": [
+              {
+                "actionGroupId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/gigtest/providers/microsoft.insights/notificationgroups/group2",
+                "webhookProperties": {
+                  "key11": "value11",
+                  "key12": "value12"
+                }
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateDynamicMetricAlertSingleResource.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateDynamicMetricAlertSingleResource.json
new file mode 100644
index 000000000000..59765d180233
--- /dev/null
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateDynamicMetricAlertSingleResource.json
@@ -0,0 +1,109 @@
+{
+    "parameters": {
+      "subscriptionId": "00000000-0000-0000-0000-000000000000",
+      "resourceGroupName": "gigtest",
+      "ruleName": "chiricutin",
+      "api-version": "2018-03-01",
+      "parameters": {
+        "location": "global",
+        "tags": {},
+        "properties": {
+          "description": "This is the description of the rule1",
+          "severity": 3,
+          "enabled": true,
+          "scopes": [
+            "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme"
+          ],
+          "evaluationFrequency": "PT1M",
+          "windowSize": "PT15M",
+          "targetResourceType":"Microsoft.Compute/virtualMachines",
+          "targetResourceRegion":"southcentralus",
+          "criteria": {
+            "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+            "allOf": [
+              {
+                "criterionType": "DynamicThresholdCriterion",
+                "name": "High_CPU_80",
+                "metricName": "Percentage CPU",
+                "metricNamespace": "microsoft.compute/virtualmachines",
+                "operator": "GreaterOrLessThan",
+                "timeAggregation": "Average",
+                "dimensions": [],
+                "alertSensitivity": "Medium",
+                "failingPeriods": {
+                    "numberOfEvaluationPeriods": 4,
+                    "minFailingPeriodsToAlert": 4
+                },
+                "ignoreDataBefore": "2019-04-04T21:00:00.000Z"
+              }
+            ]
+          },
+          "autoMitigate": false,
+          "actions": [
+            {
+              "actionGroupId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/gigtest/providers/microsoft.insights/notificationgroups/group2",
+              "webhookProperties": {
+                "key11": "value11",
+                "key12": "value12"
+              }
+            }
+          ]
+        }
+      }
+    },
+    "responses": {
+      "200": {
+        "headers": {},
+        "body": {
+          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/providers/microsoft.insights/metricalerts/chiricutin",
+          "type": "Microsoft.Insights/metricAlerts",
+          "location": "global",
+          "tags": {
+            "hidden-link:/subscriptions/b67f7fec-69fc-4974-9099-a26bd6ffeda3/resourceGroups/Rac46PostSwapRG/providers/Microsoft.Web/sites/leoalerttest": "Resource"
+          },
+          "properties": {
+            "description": "This is the description of the rule1",
+            "severity": 3,
+            "enabled": true,
+            "scopes": [
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme"
+            ],
+            "evaluationFrequency": "PT1M",
+            "windowSize": "PT15M",
+            "targetResourceType":"Microsoft.Compute/virtualMachines",
+            "targetResourceRegion":"southcentralus",
+            "criteria": {
+              "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+              "allOf": [
+                {
+                    "criterionType": "DynamicThresholdCriterion",
+                    "name": "High_CPU_80",
+                    "metricName": "Percentage CPU",
+                    "metricNamespace": "microsoft.compute/virtualmachines",
+                    "operator": "GreaterOrLessThan",
+                    "timeAggregation": "Average",
+                    "dimensions": [],                   
+                    "alertSensitivity": "Medium",
+                    "failingPeriods": {
+                        "numberOfEvaluationPeriods": 4,
+                        "minFailingPeriodsToAlert": 4
+                    },
+                    "ignoreDataBefore": "2019-04-04T21:00:00.000Z"
+                }
+              ]
+            },
+            "autoMitigate":false,
+            "actions": [
+              {
+                "actionGroupId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/gigtest/providers/microsoft.insights/notificationgroups/group2",
+                "webhookProperties": {
+                  "key11": "value11",
+                  "key12": "value12"
+                }
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
\ No newline at end of file
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateMetricAlertSingleResource.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateMetricAlertSingleResource.json
index 3865f1ac124c..c7aa4f165acf 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateMetricAlertSingleResource.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateMetricAlertSingleResource.json
@@ -20,6 +20,7 @@
           "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
           "allOf": [
             {
+              "criterionType": "StaticThresholdCriterion",
               "name": "High_CPU_80",
               "metricName": "\\Processor(_Total)\\% Processor Time",
               "dimensions": [
@@ -66,6 +67,7 @@
             "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
             "allOf": [
               {
+                "criterionType": "StaticThresholdCriterion",
                 "name": "High_CPU_80",
                 "metricName": "\\Processor(_Total)\\% Processor Time",
                 "dimensions": [
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getDynamicMetricAlertMultipleResource.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getDynamicMetricAlertMultipleResource.json
new file mode 100644
index 000000000000..5ac5532e4c23
--- /dev/null
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getDynamicMetricAlertMultipleResource.json
@@ -0,0 +1,63 @@
+{
+    "parameters": {
+      "subscriptionId": "00000000-0000-0000-0000-000000000000",
+      "resourceGroupName": "gigtest",
+      "ruleName": "MetricAlertOnMultipleResources",
+      "api-version": "2018-03-01"
+    },
+    "responses": {
+      "200": {
+        "headers": {},
+        "body": {
+          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/providers/microsoft.insights/metricalerts/MetricAlertOnMultipleResources",
+          "type": "Microsoft.Insights/metricAlerts",
+          "location": "global",
+          "tags": {
+            "hidden-link:/subscriptions/b67f7fec-69fc-4974-9099-a26bd6ffeda3/resourceGroups/Rac46PostSwapRG/providers/Microsoft.Web/sites/leoalerttest": "Resource"
+          },
+          "properties": {
+            "description": "This is the description of the rule1",
+            "severity": 3,
+            "enabled": true,
+            "scopes": [
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme1",
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme2"
+            ],
+            "evaluationFrequency": "PT1M",
+            "windowSize": "PT15M",
+            "targetResourceType":"Microsoft.Compute/virtualMachines",
+            "targetResourceRegion":"southcentralus",
+            "criteria": {
+              "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+              "allOf": [
+                {
+                    "criterionType": "DynamicThresholdCriterion",
+                    "name": "High_CPU_80",
+                    "metricName": "Percentage CPU",
+                    "metricNamespace": "microsoft.compute/virtualmachines",
+                    "operator": "GreaterOrLessThan",
+                    "timeAggregation": "Average",
+                    "dimensions": [],
+                    "alertSensitivity": "Medium",
+                    "failingPeriods": {
+                        "numberOfEvaluationPeriods": 4,
+                        "minFailingPeriodsToAlert": 4
+                    }
+                }
+              ]
+            },
+            "autoMitigate": false,
+            "actions": [
+              {
+                "actionGroupId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/gigtest/providers/microsoft.insights/notificationgroups/group2",
+                "webhookProperties": {
+                  "key11": "value11",
+                  "key12": "value12"
+                }
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
\ No newline at end of file
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getDynamicMetricAlertSingleResource.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getDynamicMetricAlertSingleResource.json
new file mode 100644
index 000000000000..3434c835ef0e
--- /dev/null
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getDynamicMetricAlertSingleResource.json
@@ -0,0 +1,61 @@
+{
+    "parameters": {
+      "subscriptionId": "00000000-0000-0000-0000-000000000000",
+      "resourceGroupName": "gigtest",
+      "ruleName": "chiricutin",
+      "api-version": "2018-03-01"
+    },
+    "responses": {
+      "200": {
+        "headers": {},
+        "body": {
+          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/providers/microsoft.insights/metricalerts/chiricutin",
+          "type": "Microsoft.Insights/metricAlerts",
+          "location": "global",
+          "tags": {
+            "hidden-link:/subscriptions/b67f7fec-69fc-4974-9099-a26bd6ffeda3/resourceGroups/Rac46PostSwapRG/providers/Microsoft.Web/sites/leoalerttest": "Resource"
+          },
+          "properties": {
+            "description": "This is the description of the rule1",
+            "severity": 3,
+            "enabled": true,
+            "scopes": [
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/gigtest/providers/Microsoft.Compute/virtualMachines/gigwadme"
+            ],
+            "evaluationFrequency": "Pt1m",
+            "windowSize": "Pt15m",
+            "criteria": {
+              "odata.type": "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+              "allOf": [
+                {
+                    "criterionType": "DynamicThresholdCriterion",
+                    "name": "High_CPU_80",
+                    "metricName": "Percentage CPU",
+                    "metricNamespace": "microsoft.compute/virtualmachines",
+                    "operator": "GreaterOrLessThan",
+                    "timeAggregation": "Average",
+                    "dimensions": [],
+                    "alertSensitivity": "Medium",
+                    "failingPeriods": {
+                        "numberOfEvaluationPeriods": 4,
+                        "minFailingPeriodsToAlert": 4
+                    },
+                    "ignoreDataBefore": null
+                }
+              ]
+            },
+            "autoMitigate": false,
+            "actions": [
+              {
+                "actionGroupId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/gigtest/providers/microsoft.insights/notificationgroups/group2",
+                "webhookProperties": {
+                  "key11": "value11",
+                  "key12": "value12"
+                }
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
\ No newline at end of file
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getMetricAlertSingleResource.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getMetricAlertSingleResource.json
index 25da26847945..510dd835dfb5 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getMetricAlertSingleResource.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getMetricAlertSingleResource.json
@@ -28,6 +28,7 @@
             "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
             "allOf": [
               {
+                "criterionType":"StaticThresholdCriterion",
                 "name": "High_CPU_80",
                 "metricName": "\\Processor(_Total)\\% Processor Time",
                 "dimensions": [
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/listMetricAlert.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/listMetricAlert.json
index 555c127d7f0e..b8e115bae254 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/listMetricAlert.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/listMetricAlert.json
@@ -29,6 +29,7 @@
                 "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
                 "allOf": [
                   {
+                    "criterionType":"StaticThresholdCriterion",
                     "name": "High_CPU_80",
                     "metricName": "CustomMetric_\\Processor(_Total)\\% Processor Time",
                     "dimensions": [
@@ -70,6 +71,7 @@
                 "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
                 "allOf": [
                   {
+                    "criterionType":"StaticThresholdCriterion",
                     "name": "Medium_CPU_50",
                     "metricName": "CustomMetric_\\Processor(_Total)\\% Processor Time",
                     "dimensions": [
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json
index 1380d5987407..7c7c65bd8648 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json
@@ -117,7 +117,9 @@
           "Get an alert rule for single resource": { "$ref": "./examples/getMetricAlertSingleResource.json" },
           "Get an alert rule for multiple resources": { "$ref": "./examples/getMetricAlertMultipleResource.json" },
           "Get an alert rule on resource group(s)": { "$ref": "./examples/getMetricAlertResourceGroup.json" },
-          "Get an alert rule on subscription": { "$ref": "./examples/getMetricAlertSubscription.json" }
+          "Get an alert rule on subscription": { "$ref": "./examples/getMetricAlertSubscription.json" },
+          "Get a dynamic alert rule for single resource": { "$ref": "./examples/getDynamicMetricAlertSingleResource.json" },
+          "Get a dynamic alert rule for multiple resources": { "$ref": "./examples/getDynamicMetricAlertMultipleResource.json" }
         }
       },
       "put": {
@@ -155,7 +157,9 @@
           "Create or update an alert rule for Single Resource": { "$ref": "./examples/createOrUpdateMetricAlertSingleResource.json" },
           "Create or update an alert rule for Multiple Resource": { "$ref": "./examples/createOrUpdateMetricAlertMultipleResource.json" },
           "Create or update an alert rule on Resource group(s)": { "$ref": "./examples/createOrUpdateMetricAlertResourceGroup.json" },
-          "Create or update an alert rule on Subscription ": { "$ref": "./examples/createOrUpdateMetricAlertSubscription.json" }
+          "Create or update an alert rule on Subscription ": { "$ref": "./examples/createOrUpdateMetricAlertSubscription.json" },
+          "Create or update a dynamic alert rule for Single Resource": { "$ref": "./examples/createOrUpdateDynamicMetricAlertSingleResource.json" },
+          "Create or update a dynamic alert rule for Multiple Resources": { "$ref": "./examples/createOrUpdateDynamicMetricAlertMultipleResource.json" }
         }
       },
       "patch": {
@@ -553,25 +557,10 @@
         }
       ],
      "required": [
-        "name",
-        "metricName",
         "operator",
-        "timeAggregation",
         "threshold"
       ],
       "properties": {
-        "name": {
-          "type": "string",
-          "description": "Name of the criteria."
-        },
-        "metricName": {
-          "type": "string",
-          "description": "Name of the metric."
-        },
-        "metricNamespace": {
-          "type": "string",
-          "description": "Namespace of the metric."
-        },
         "operator": {
           "enum": [
             "Equals",
@@ -587,30 +576,10 @@
           },
           "description": "the criteria operator."
         },
-        "timeAggregation": {
-          "enum": [
-            "Average",
-            "Minimum",
-            "Maximum",
-            "Total"
-          ],
-          "x-ms-enum": {
-            "name": "AggregationType",
-            "modelAsString": true
-          },
-          "description": "the criteria time aggregation types."
-        },
         "threshold": {
           "type": "number",
           "format":  "double",
           "description": "the criteria threshold value that activates the alert."
-        },
-        "dimensions": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/MetricDimension"
-          },
-          "description": "List of dimension conditions."
         }
       },
       "description": "Criterion to filter metrics."
@@ -668,18 +637,119 @@
       "properties":{
         "criterionType" : {
           "enum":[
-           "StaticThresholdCriterion"            
+           "StaticThresholdCriterion",
+           "DynamicThresholdCriterion"
           ],
           "x-ms-enum" : {
             "name" : "criterionType",
             "modelAsString": true
           },
           "description":" Specifies the type of threshold criteria"
+        },
+        "name": {
+          "type": "string",
+          "description": "Name of the criteria."
+        },
+        "metricName": {
+          "type": "string",
+          "description": "Name of the metric."
+        },
+        "metricNamespace": {
+          "type": "string",
+          "description": "Namespace of the metric."
+        },
+        "timeAggregation": {
+          "enum": [
+            "Average",
+            "Minimum",
+            "Maximum",
+            "Total"
+          ],
+          "x-ms-enum": {
+            "name": "AggregationType",
+            "modelAsString": true
+          },
+          "description": "the criteria time aggregation types."
+        },
+        "dimensions": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/MetricDimension"
+          },
+          "description": "List of dimension conditions."
+        }
+      },
+      "required": [ "criterionType", "name", "metricName", "timeAggregation" ],
+      "description": "The types of conditions for a multi resource alert."
+    },
+    "DynamicMetricCriteria" : {	 
+      "x-ms-discriminator-value": "DynamicThresholdCriterion",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/MultiMetricCriteria"
+        }
+      ],
+     "required": [
+        "operator",
+        "alertSensitivity",
+        "failingPeriods"
+      ],
+      "properties": {
+        "operator": {
+          "enum": [
+            "GreaterThan",
+            "LessThan",
+            "GreaterOrLessThan"
+          ],
+          "x-ms-enum": {
+            "name": "DynamicThresholdOperator",
+            "modelAsString": true
+          },
+          "description": "The operator used to compare the metric value against the threshold."
+        },
+        "alertSensitivity": {
+          "enum" : [
+            "Low",
+            "Medium",
+            "High"
+          ],
+          "x-ms-enum" : {
+            "name" : "DynamicThresholdSensitivity",
+            "modelAsString": true
+          },
+          "description": "The extent of deviation required to trigger an alert. This will affect how tight the threshold is to the metric series pattern."
+        },
+        "failingPeriods" : {
+          "type" : "object",
+          "$ref"  : "#/definitions/DynamicThresholdFailingPeriods",
+          "description" : "The minimum number of violations required within the selected lookback time window required to raise an alert."
+        },
+        "ignoreDataBefore" : {
+          "type" : "string",
+          "format": "date-time",
+          "description" :"Use this option to set the date from which to start learning the metric historical data and calculate the dynamic thresholds (in ISO8601 format)"
         }
       },
-      "required": ["criterionType"],
-      "description": "The types of conditions for a multi resource alert"
-    }    
+      "description": "Criterion for dynamic threshold."
+    },
+    "DynamicThresholdFailingPeriods" : {
+      "required": [
+        "numberOfEvaluationPeriods",
+        "minFailingPeriodsToAlert"
+      ],
+      "properties": {
+        "numberOfEvaluationPeriods": {
+          "type": "number",
+          "description": "The number of aggregated lookback points. The lookback time window is calculated based on the aggregation granularity (windowSize) and the selected number of aggregated points."
+        },
+        "minFailingPeriodsToAlert": {
+          "type": "number",
+          "description": "The number of violations to trigger an alert. Should be smaller or equal to numberOfEvaluationPeriods."
+        }
+      },
+      "description": "The minimum number of violations required within the selected lookback time window required to raise an alert."
+    }
   },
   "parameters": {
     "SubscriptionIdParameter": {