diff --git a/server/src/controllers/analytics_controller.ts b/server/src/controllers/analytics_controller.ts
index 84fb038..b3ad076 100644
--- a/server/src/controllers/analytics_controller.ts
+++ b/server/src/controllers/analytics_controller.ts
@@ -340,6 +340,11 @@ export async function setAlert(analyticUnitId: AnalyticUnit.AnalyticUnitId, aler
   }
 }
 
+export async function setMetric(analyticUnitId: AnalyticUnit.AnalyticUnitId, metric: any, datasource: any) {
+  metric.datasource = datasource;
+  AnalyticUnit.setMetric(analyticUnitId, metric);
+}
+
 export async function updateSegments(
   id: AnalyticUnit.AnalyticUnitId,
   segmentsToInsert: Segment.Segment[],
diff --git a/server/src/models/analytic_unit_model.ts b/server/src/models/analytic_unit_model.ts
index 9cdaae0..600a956 100644
--- a/server/src/models/analytic_unit_model.ts
+++ b/server/src/models/analytic_unit_model.ts
@@ -69,7 +69,7 @@ export class AnalyticUnit {
     public name: string,
     public panelUrl: string,
     public type: string,
-    public metric: Metric,
+    public metric?: Metric,
     public alert?: boolean,
     public id?: AnalyticUnitId,
     public lastDetectionTime?: number,
@@ -85,18 +85,20 @@ export class AnalyticUnit {
     if(type === undefined) {
       throw new Error(`Missing field "type"`);
     }
-    if(metric === undefined) {
-      throw new Error(`Missing field "metric"`);
-    }
   }
 
   public toObject() {
+    let metric;
+    if(this.metric !== undefined) {
+      metric = this.metric.toObject();
+    }
+
     return {
       _id: this.id,
       name: this.name,
       panelUrl: this.panelUrl,
       type: this.type,
-      metric: this.metric.toObject(),
+      metric,
       alert: this.alert,
       lastDetectionTime: this.lastDetectionTime,
       status: this.status,
@@ -108,11 +110,15 @@ export class AnalyticUnit {
     if(obj === undefined) {
       throw new Error('obj is undefined');
     }
+    let metric: Metric;
+    if(obj.metric !== undefined) {
+      metric = Metric.fromObject(obj.metric);
+    }
     return new AnalyticUnit(
       obj.name,
       obj.panelUrl,
       obj.type,
-      Metric.fromObject(obj.metric),
+      metric,
       obj.alert,
       obj._id,
       obj.lastDetectionTime,
@@ -174,6 +180,10 @@ export async function setAlert(id: AnalyticUnitId, alert: boolean) {
   return db.updateOne(id, { alert });
 }
 
+export async function setMetric(id: AnalyticUnitId, metric: Metric) {
+  return db.updateOne(id, { metric });
+}
+
 export function getDetectorByType(analyticUnitType: string): DetectorType {
   let detector;
   _.forOwn(ANALYTIC_UNIT_TYPES, (types, detectorType) => {
diff --git a/server/src/routes/analytic_units_router.ts b/server/src/routes/analytic_units_router.ts
index 6de6335..b2f28fb 100644
--- a/server/src/routes/analytic_units_router.ts
+++ b/server/src/routes/analytic_units_router.ts
@@ -105,7 +105,37 @@ async function createUnit(ctx: Router.IRouterContext) {
   }
 }
 
-async function setAlert(ctx: Router.IRouterContext) {
+async function updateMetric(ctx: Router.IRouterContext) {
+  try {
+    const { analyticUnitId, metric, datasource } = ctx.request.body as {
+      analyticUnitId: AnalyticUnit.AnalyticUnitId, metric: any, datasource: any
+    };
+    if(analyticUnitId === undefined) {
+      throw new Error('Cannot update undefined id');
+    }
+    if(metric === undefined) {
+      throw new Error('Cannot set undefined metric');
+    }
+    if(datasource === undefined) {
+      throw new Error('Cannot set undefined datasource');
+    }
+
+    await AnalyticsController.setMetric(analyticUnitId, metric, datasource);
+
+    ctx.response.body = {
+      code: 200,
+      message: 'Success'
+    };
+  } catch (e) {
+    ctx.response.status = 500;
+    ctx.response.body = {
+      code: 500,
+      message: `PATCH /analyticUnits/metric error: ${e.message}`
+    };
+  }
+}
+
+async function updateAlert(ctx: Router.IRouterContext) {
   try {
     const { analyticUnitId, alert } = ctx.request.body as {
       analyticUnitId: AnalyticUnit.AnalyticUnitId, alert: boolean
@@ -160,6 +190,7 @@ router.get('/', getUnit);
 router.get('/units', getUnits);
 router.get('/status', getStatus);
 router.get('/types', getTypes);
-router.patch('/alert', setAlert);
+router.patch('/metric', updateMetric);
+router.patch('/alert', updateAlert);
 router.post('/', createUnit);
 router.delete('/', deleteUnit);