diff --git a/src/main/java/de/ph87/data/series/Series.java b/src/main/java/de/ph87/data/series/Series.java
index c84a0f7..6df67da 100644
--- a/src/main/java/de/ph87/data/series/Series.java
+++ b/src/main/java/de/ph87/data/series/Series.java
@@ -37,6 +37,12 @@ public class Series {
   @Enumerated(EnumType.STRING)
   private SeriesType type;
 
+  @Column(nullable = false)
+  private boolean graphZero = false;
+
+  @Column(nullable = false)
+  private boolean graphAutoscale = false;
+
   public Series(@NonNull final String name, @NonNull final Unit unit, @NonNull final SeriesType type) {
     this.name = name;
     this.title = name;
diff --git a/src/main/java/de/ph87/data/series/SeriesDto.java b/src/main/java/de/ph87/data/series/SeriesDto.java
index dc44f50..b3d3e62 100644
--- a/src/main/java/de/ph87/data/series/SeriesDto.java
+++ b/src/main/java/de/ph87/data/series/SeriesDto.java
@@ -20,6 +20,10 @@ public class SeriesDto {
 
   public final SeriesType type;
 
+  private final boolean graphZero;
+
+  private final boolean graphAutoscale;
+
   public SeriesDto(@NonNull final Series series) {
     this.id = series.getId();
     this.name = series.getName();
@@ -27,6 +31,8 @@ public class SeriesDto {
     this.unit = series.getUnit();
     this.decimals = series.getDecimals();
     this.type = series.getType();
+    this.graphZero = series.isGraphZero();
+    this.graphAutoscale = series.isGraphAutoscale();
   }
 
   public String format(@Nullable final Double value) {
diff --git a/src/main/java/de/ph87/data/series/graph/Graph.java b/src/main/java/de/ph87/data/series/graph/Graph.java
index c9762c2..9c720bb 100644
--- a/src/main/java/de/ph87/data/series/graph/Graph.java
+++ b/src/main/java/de/ph87/data/series/graph/Graph.java
@@ -72,8 +72,8 @@ public class Graph {
 
     // find bounds
     double vSum = 0;
-    double vMin = Double.MAX_VALUE;
-    double vMax = Double.MIN_VALUE;
+    double vMin = series.isGraphZero() ? 0.0 : Double.MAX_VALUE;
+    double vMax = series.isGraphZero() ? 0.0 : Double.MIN_VALUE;
     for (final GraphPoint point : points) {
       vMin = Math.min(vMin, point.getValue());
       vMax = max(vMax, point.getValue());
@@ -81,7 +81,7 @@ public class Graph {
     }
 
     // auto scale
-    autoscale = new Autoscale(series.unit, vMin, vMax);
+    autoscale = new Autoscale(series, vMin, vMax);
     vMin *= autoscale.factor;
     vMax *= autoscale.factor;
     vSum *= autoscale.factor;
diff --git a/src/main/java/de/ph87/data/value/Autoscale.java b/src/main/java/de/ph87/data/value/Autoscale.java
index c235966..3ec2219 100644
--- a/src/main/java/de/ph87/data/value/Autoscale.java
+++ b/src/main/java/de/ph87/data/value/Autoscale.java
@@ -1,5 +1,6 @@
 package de.ph87.data.value;
 
+import de.ph87.data.series.*;
 import lombok.*;
 
 import java.util.*;
@@ -14,14 +15,20 @@ public class Autoscale {
   @NonNull
   public final String unit;
 
-  public Autoscale(@NonNull final Unit sourceUnit, final double... values) {
-    final double abs = sourceUnit.factor * Arrays.stream(values).map(Math::abs).max().orElse(0);
+  public Autoscale(@NonNull final SeriesDto series, final double... values) {
+    if (!series.isGraphAutoscale()) {
+      this.factor = 1;
+      this.unit = series.unit.unit;
+      return;
+    }
+
+    final double abs = series.unit.factor * Arrays.stream(values).map(Math::abs).max().orElse(0);
     final double exp = Math.max(0, Math.log10(abs));
     final int group = (int) Math.floor(exp / 3);
-    this.factor = sourceUnit.factor * Math.pow(10, -group * 3);
+    this.factor = series.unit.factor * Math.pow(10, -group * 3);
 
     final int index = (SI_PREFIX.length - 1) / 2 + group;
-    this.unit = SI_PREFIX[index] + sourceUnit.base.unit;
+    this.unit = SI_PREFIX[index] + series.unit.base.unit;
   }
 
   @NonNull