diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..dd7ab6f
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,4 @@
+# Changelog
+
+## 0.2.0
+* Change order of time\value in `TimeSerie` : now it's `[time, value][]` instead of `[value, time][]`
diff --git a/package-lock.json b/package-lock.json
index 39ebf9c..1e66a10 100755
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@chartwerk/core",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 543f4ff..8d35abf 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chartwerk/core",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "description": "Chartwerk core",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/src/index.ts b/src/index.ts
index b1f7704..7fad2a3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -938,7 +938,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
       this.series
         .filter(serie => serie.visible !== false && this.filterSerieByYAxisOrientation(serie, yAxisOrientation.LEFT))
         .map(
-          serie => minBy<number[]>(serie.datapoints, dp => dp[0])[0]
+          serie => minBy<number[]>(serie.datapoints, dp => dp[1])[1]
         )
     );
     return minValue;
@@ -956,7 +956,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
       this.series
         .filter(serie => serie.visible !== false && this.filterSerieByYAxisOrientation(serie, yAxisOrientation.LEFT))
         .map(
-          serie => maxBy<number[]>(serie.datapoints, dp => dp[0])[0]
+          serie => maxBy<number[]>(serie.datapoints, dp => dp[1])[1]
         )
     );
     return maxValue;
@@ -974,7 +974,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
       this.series
         .filter(serie => serie.visible !== false && this.filterSerieByYAxisOrientation(serie, yAxisOrientation.RIGHT))
         .map(
-          serie => minBy<number[]>(serie.datapoints, dp => dp[0])[0]
+          serie => minBy<number[]>(serie.datapoints, dp => dp[1])[1]
         )
     );
     return minValue;
@@ -991,7 +991,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
       this.series
         .filter(serie => serie.visible !== false && this.filterSerieByYAxisOrientation(serie, yAxisOrientation.RIGHT))
         .map(
-          serie => maxBy<number[]>(serie.datapoints, dp => dp[0])[0]
+          serie => maxBy<number[]>(serie.datapoints, dp => dp[1])[1]
         )
     );
     return maxValue;
@@ -1009,7 +1009,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
       this.series
         .filter(serie => serie.visible !== false)
         .map(
-          serie => minBy<number[]>(serie.datapoints, dp => dp[1])[1]
+          serie => minBy<number[]>(serie.datapoints, dp => dp[0])[0]
         )
     );
     return minValue;
@@ -1026,7 +1026,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
       this.series
         .filter(serie => serie.visible !== false)
         .map(
-          serie => maxBy<number[]>(serie.datapoints, dp => dp[1])[1]
+          serie => maxBy<number[]>(serie.datapoints, dp => dp[0])[0]
         )
     );
     return maxValue;
@@ -1058,8 +1058,8 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
     if(this.series.length === 0) {
       return undefined;
     }
-    const startTimestamp = first(this.series[0].datapoints)[1];
-    const endTimestamp = last(this.series[0].datapoints)[1];
+    const startTimestamp = first(this.series[0].datapoints)[0];
+    const endTimestamp = last(this.series[0].datapoints)[0];
     return (endTimestamp - startTimestamp) / 1000;
   }
 
@@ -1095,7 +1095,7 @@ abstract class ChartwerkPod<T extends TimeSerie, O extends Options> {
 
   get timeInterval(): number {
     if(this.series !== undefined && this.series.length > 0 && this.series[0].datapoints.length > 1) {
-      const interval = this.series[0].datapoints[1][1] - this.series[0].datapoints[0][1];
+      const interval = this.series[0].datapoints[1][0] - this.series[0].datapoints[0][0];
       return interval;
     }
     if(this.options.timeInterval !== undefined && this.options.timeInterval.count !== undefined) {
diff --git a/src/types.ts b/src/types.ts
index b49967d..182a82b 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,8 +1,10 @@
 export type Margin = { top: number, right: number, bottom: number, left: number };
+export type Timestamp = number;
+
 // TODO: Pods can render not only "time" series
 export type TimeSerie = {
   target: string,
-  datapoints: [number, number][],
+  datapoints: [Timestamp, number][],
   alias?: string,
   visible?: boolean,
   color?: string,