diff --git a/server/src/services/analytic_service/analytic_client.rs b/server/src/services/analytic_service/analytic_client.rs
index 62d2442..48d60a1 100644
--- a/server/src/services/analytic_service/analytic_client.rs
+++ b/server/src/services/analytic_service/analytic_client.rs
@@ -7,6 +7,7 @@ use crate::services::segments_service::Segment;
 use super::analytic_unit::types::AnalyticUnitConfig;
 use super::analytic_unit::types::PatchConfig;
 use super::types::DetectionTask;
+use super::types::HSR;
 use super::types::HSRTask;
 use super::types::LearningStatus;
 use super::types::LearningTrain;
@@ -77,7 +78,7 @@ impl AnalyticClient {
         }
     }
 
-    pub async fn get_hsr(&self, from: u64, to: u64) -> anyhow::Result<Vec<(u64, f64)>> {
+    pub async fn get_hsr(&self, from: u64, to: u64) -> anyhow::Result<HSR> {
         let (tx, rx) = oneshot::channel();
         let req = AnalyticServiceMessage::Request(RequestType::GetHSR(HSRTask {
             sender: tx,
@@ -88,7 +89,7 @@ impl AnalyticClient {
         // TODO: handle second error
         match rx.await? {
             Ok(r) => Ok(r),
-            Err(e) => Ok(Vec::new()),
+            Err(e) => Ok(HSR::TimeSerie(Vec::new())),
         }
     }
 }
diff --git a/server/src/services/analytic_service/analytic_service.rs b/server/src/services/analytic_service/analytic_service.rs
index 1684a4e..8ab63cb 100644
--- a/server/src/services/analytic_service/analytic_service.rs
+++ b/server/src/services/analytic_service/analytic_service.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use super::analytic_unit::types::{AnalyticUnitConfig, PatchConfig, PatternConfig};
-use super::types::{self, DetectionRunnerConfig, LearningTrain, LearningWaiter};
+use super::types::{self, DetectionRunnerConfig, HSR, LearningTrain, LearningWaiter};
 use super::{
     analytic_client::AnalyticClient,
     analytic_unit::pattern_analytic_unit::{self, LearningResults, PatternAnalyticUnit},
@@ -178,7 +178,6 @@ impl AnalyticService {
             }
             RequestType::PatchConfig(patch_obj, tx) => {
                 self.patch_config(patch_obj, tx);
-                // tx.send(()).unwrap();
             }
             RequestType::GetHSR(task) => {
                 if self.analytic_unit.is_some() {
@@ -346,7 +345,7 @@ impl AnalyticService {
     }
 
     async fn get_hsr(
-        tx: oneshot::Sender<anyhow::Result<Vec<(u64, f64)>>>,
+        tx: oneshot::Sender<anyhow::Result<HSR>>,
         analytic_unit: Arc<RwLock<Box<dyn AnalyticUnit + Send + Sync>>>,
         ms: MetricService,
         from: u64,
diff --git a/server/src/services/analytic_service/analytic_unit/anomaly_analytic_unit.rs b/server/src/services/analytic_service/analytic_unit/anomaly_analytic_unit.rs
index a4ef35b..074c07e 100644
--- a/server/src/services/analytic_service/analytic_unit/anomaly_analytic_unit.rs
+++ b/server/src/services/analytic_service/analytic_unit/anomaly_analytic_unit.rs
@@ -1,6 +1,4 @@
-use crate::services::{
-    analytic_service::types, metric_service::MetricService, segments_service::SegmentsService,
-};
+use crate::services::{analytic_service::types::{self, HSR}, metric_service::MetricService, segments_service::SegmentsService};
 
 use super::types::{AnalyticUnit, AnalyticUnitConfig, AnomalyConfig, LearningResult};
 
@@ -58,22 +56,22 @@ impl AnalyticUnit for AnomalyAnalyticUnit {
         Ok(Default::default())
     }
 
+    // TODO: use hsr for learning and detections
     async fn get_hsr(
         &self,
         ms: MetricService,
         from: u64,
         to: u64,
-    ) -> anyhow::Result<Vec<(u64, f64)>> {
-        // TODO: implement
+    ) -> anyhow::Result<HSR> {
         let mr = ms.query(from, to, DETECTION_STEP).await.unwrap();
 
         if mr.data.keys().len() == 0 {
-            return Ok(Vec::new());
+            return Ok(HSR::TimeSerie(Vec::new()));
         }
 
         let k = mr.data.keys().nth(0).unwrap();
         let ts = mr.data[k].clone();
 
-        Ok(ts)
+        Ok(HSR::TimeSerie(ts))
     }
 }
diff --git a/server/src/services/analytic_service/analytic_unit/pattern_analytic_unit.rs b/server/src/services/analytic_service/analytic_unit/pattern_analytic_unit.rs
index ba1c8c5..4e9aa17 100644
--- a/server/src/services/analytic_service/analytic_unit/pattern_analytic_unit.rs
+++ b/server/src/services/analytic_service/analytic_unit/pattern_analytic_unit.rs
@@ -10,11 +10,7 @@ use linfa_svm::Svm;
 
 use ndarray::Array;
 
-use crate::services::{
-    analytic_service::types::{self, LearningTrain},
-    metric_service::MetricService,
-    segments_service::{Segment, SegmentType, SegmentsService},
-};
+use crate::services::{analytic_service::types::{self, HSR, LearningTrain}, metric_service::MetricService, segments_service::{Segment, SegmentType, SegmentsService}};
 
 use super::types::{AnalyticUnit, AnalyticUnitConfig, LearningResult, PatternConfig};
 
@@ -403,21 +399,22 @@ impl AnalyticUnit for PatternAnalyticUnit {
         Ok(results)
     }
 
+    // TODO: use hsr for learning and detections
     async fn get_hsr(
         &self,
         ms: MetricService,
         from: u64,
         to: u64,
-    ) -> anyhow::Result<Vec<(u64, f64)>> {
+    ) -> anyhow::Result<HSR> {
         let mr = ms.query(from, to, DETECTION_STEP).await.unwrap();
 
         if mr.data.keys().len() == 0 {
-            return Ok(Vec::new());
+            return Ok(HSR::TimeSerie(Vec::new()));
         }
 
         let k = mr.data.keys().nth(0).unwrap();
         let ts = mr.data[k].clone();
 
-        Ok(ts)
+        Ok(HSR::TimeSerie(ts))
     }
 }
diff --git a/server/src/services/analytic_service/analytic_unit/threshold_analytic_unit.rs b/server/src/services/analytic_service/analytic_unit/threshold_analytic_unit.rs
index 5c46908..53fe45c 100644
--- a/server/src/services/analytic_service/analytic_unit/threshold_analytic_unit.rs
+++ b/server/src/services/analytic_service/analytic_unit/threshold_analytic_unit.rs
@@ -1,6 +1,4 @@
-use crate::services::{
-    analytic_service::types, metric_service::MetricService, segments_service::SegmentsService,
-};
+use crate::services::{analytic_service::types::{self, HSR}, metric_service::MetricService, segments_service::SegmentsService};
 
 use super::types::{AnalyticUnit, AnalyticUnitConfig, LearningResult, ThresholdConfig};
 
@@ -75,21 +73,22 @@ impl AnalyticUnit for ThresholdAnalyticUnit {
         Ok(result)
     }
 
+    // TODO: use hsr for learning and detections
     async fn get_hsr(
         &self,
         ms: MetricService,
         from: u64,
         to: u64,
-    ) -> anyhow::Result<Vec<(u64, f64)>> {
+    ) -> anyhow::Result<HSR> {
         let mr = ms.query(from, to, DETECTION_STEP).await.unwrap();
 
         if mr.data.keys().len() == 0 {
-            return Ok(Vec::new());
+            return Ok(HSR::TimeSerie(Vec::new()));
         }
 
         let k = mr.data.keys().nth(0).unwrap();
         let ts = mr.data[k].clone();
 
-        Ok(ts)
+        Ok(HSR::TimeSerie(ts))
     }
 }
diff --git a/server/src/services/analytic_service/analytic_unit/types.rs b/server/src/services/analytic_service/analytic_unit/types.rs
index 8ff178d..1b16bf0 100644
--- a/server/src/services/analytic_service/analytic_unit/types.rs
+++ b/server/src/services/analytic_service/analytic_unit/types.rs
@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 use async_trait::async_trait;
 
-use crate::services::{metric_service::MetricService, segments_service::SegmentsService};
+use crate::services::{analytic_service::types::HSR, metric_service::MetricService, segments_service::SegmentsService};
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct PatternConfig {
@@ -136,7 +136,7 @@ pub trait AnalyticUnit {
         ms: MetricService,
         from: u64,
         to: u64,
-    ) -> anyhow::Result<Vec<(u64, f64)>>;
+    ) -> anyhow::Result<HSR>;
 }
 
 #[derive(Deserialize, Serialize, Debug)]
diff --git a/server/src/services/analytic_service/types.rs b/server/src/services/analytic_service/types.rs
index f048a02..9513484 100644
--- a/server/src/services/analytic_service/types.rs
+++ b/server/src/services/analytic_service/types.rs
@@ -61,10 +61,18 @@ pub struct DetectionTask {
     pub to: u64,
 }
 
+
+// HSR Stands for Hastic Signal Representation,
+// varies for different analytic units
+#[derive(Debug, Serialize)]
+pub enum HSR {
+    TimeSerie(Vec<(u64, f64)>)
+}
+
 #[derive(Debug)]
 pub struct HSRTask {
     // TODO: make enum for HSR which is different for different Analytic Types
-    pub sender: oneshot::Sender<Result<Vec<(u64, f64)>>>,
+    pub sender: oneshot::Sender<Result<HSR>>,
     pub from: u64,
     pub to: u64,
 }