diff --git a/Wetterstation/Form1.Designer.cs b/Wetterstation/Form1.Designer.cs
index 7de02f9fb2ea80a9e90fa022be14e9241ac567f2..d2544c51db4b37c25682e3e2279466e7981bbdf4 100644
--- a/Wetterstation/Form1.Designer.cs
+++ b/Wetterstation/Form1.Designer.cs
@@ -843,6 +843,7 @@ namespace Wetterstation
             this.pbTendenzPressure.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
             this.pbTendenzPressure.TabIndex = 71;
             this.pbTendenzPressure.TabStop = false;
+            this.pbTendenzPressure.Visible = false;
             // 
             // pictureBox2
             // 
@@ -868,6 +869,7 @@ namespace Wetterstation
             this.pbTendenzTempOut.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
             this.pbTendenzTempOut.TabIndex = 75;
             this.pbTendenzTempOut.TabStop = false;
+            this.pbTendenzTempOut.Visible = false;
             // 
             // pbTendenzTempIn
             // 
@@ -881,6 +883,7 @@ namespace Wetterstation
             this.pbTendenzTempIn.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
             this.pbTendenzTempIn.TabIndex = 76;
             this.pbTendenzTempIn.TabStop = false;
+            this.pbTendenzTempIn.Visible = false;
             // 
             // Hintergrund
             // 
diff --git a/Wetterstation/Form1.cs b/Wetterstation/Form1.cs
index 99ba916a4838b1c7cb23ade1793cd7547fbc0133..9910cb2c6aac74363fc1d17ceeaba870b0932864 100644
--- a/Wetterstation/Form1.cs
+++ b/Wetterstation/Form1.cs
@@ -245,6 +245,8 @@ namespace Wetterstation
                     lbTempOutMin.Invoke(new Action(() => { lbTempOutMin.Text = weatherData.tempMin + " °C"; }));
                     lbTempOutMax.Invoke(new Action(() => { lbTempOutMax.Text = weatherData.tempMax + " °C"; }));
                     owm.Temperatures = weatherData.temp;
+                    if (owm._temperatures.Count < 10) pbTendenzTempOut.Invoke(new Action(() => { pbTendenzTempOut.Visible = false; }));
+                    else pbTendenzTempOut.Invoke(new Action(() => { pbTendenzTempOut.Visible = true; }));
                     pbTendenzTempOut.Invoke(new Action(() => { pbTendenzTempOut.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), owm.tempTendenz()); }));
                 }
                 if(!node1Out.humidity)
@@ -264,6 +266,8 @@ namespace Wetterstation
                 {
                     lbLuftdruck.Invoke(new Action(() => { lbLuftdruck.Text = weatherData.pressure + " mbar"; }));
                     owm.Pressures = (double)weatherData.pressure;
+                    if (owm._pressures.Count < 10) pbTendenzPressure.Invoke(new Action(() => { pbTendenzPressure.Visible = false; }));
+                    else pbTendenzPressure.Invoke(new Action(() => { pbTendenzPressure.Visible = true; }));
                     pbTendenzPressure.Invoke(new Action(() => { pbTendenzPressure.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), owm.pressureTendenz()); }));
                 }
                 if(!node1Out.rain)
@@ -357,6 +361,8 @@ namespace Wetterstation
                     lbTempInMin.Invoke(new Action(() => { lbTempInMin.Text = node1In.tempMin + " °C"; }));
                     lbTempInMax.Invoke(new Action(() => { lbTempInMax.Text = node1In.tempMax + " °C"; }));
                     node1In.Temperatures = (double)weatherData[0]["temperature"];
+                    if (node1In._temperatures.Count < 10) pbTendenzTempIn.Invoke(new Action(() => { pbTendenzTempIn.Visible = false; }));
+                    else pbTendenzTempIn.Invoke(new Action(() => { pbTendenzTempIn.Visible = true; }));
                     pbTendenzTempIn.Invoke(new Action(() => { pbTendenzTempIn.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), node1In.tempTendenz()); }));
                 }
                 if (weatherData[0]["client"] == node1In.host && weatherData[0]["sensor"] == node1In.name && weatherData[0]["humidity"] != null)
@@ -369,6 +375,8 @@ namespace Wetterstation
                     node1In.pressure = true;
                     lbLuftdruck.Invoke(new Action(() => { lbLuftdruck.Text = weatherData[0]["pressure"] + " hPa"; }));
                     node1In.Pressures = (double)weatherData[0]["pressure"];
+                    if (node1In._pressures.Count < 10) pbTendenzPressure.Invoke(new Action(() => { pbTendenzPressure.Visible = false; }));
+                    else pbTendenzPressure.Invoke(new Action(() => { pbTendenzPressure.Visible = true; }));
                     pbTendenzPressure.Invoke(new Action(() => { pbTendenzPressure.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), node1In.pressureTendenz()); }));
                 }
                 if (weatherData[0]["client"] == node1Out.host && weatherData[0]["sensor"] == node1Out.name && weatherData[0]["temperature"] != null)
@@ -380,6 +388,8 @@ namespace Wetterstation
                     lbTempOutMin.Invoke(new Action(() => { lbTempOutMin.Text = node1Out.tempMin + " °C"; }));
                     lbTempOutMax.Invoke(new Action(() => { lbTempOutMax.Text = node1Out.tempMax + " °C"; }));
                     node1Out.Temperatures = (double)weatherData[0]["temperature"];
+                    if (node1Out._temperatures.Count < 10) pbTendenzTempOut.Invoke(new Action(() => { pbTendenzTempOut.Visible = false; }));
+                    else pbTendenzTempOut.Invoke(new Action(() => { pbTendenzTempOut.Visible = true; }));
                     pbTendenzTempOut.Invoke(new Action(() => { pbTendenzTempOut.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), node1Out.tempTendenz()); }));
                 }
                 if (weatherData[0]["client"] == node1Out.host && weatherData[0]["sensor"] == node1Out.name && weatherData[0]["humidity"] != null)
diff --git a/Wetterstation/Sensor.cs b/Wetterstation/Sensor.cs
index 8ca72861bce5cae9ee06a201638afd8482afaca9..a297b9069a3cabc607c52535b6331c205d46e0de 100644
--- a/Wetterstation/Sensor.cs
+++ b/Wetterstation/Sensor.cs
@@ -17,8 +17,8 @@ namespace Wetterstation
         public bool snow { get; set; }
         public double tempMin { get; set; }
         public double tempMax { get; set; }
-        private List<double> _temperatures = new List<double>();
-        private List<double> _pressures = new List<double>();
+        public List<double> _temperatures = new List<double>();
+        public List<double> _pressures = new List<double>();
         public double Temperatures
         {
             set