diff --git a/Wetterstation/Form1.cs b/Wetterstation/Form1.cs
index 9fa26604c45d8fa4fd52c6d3a7ec4981d5e39998..622d690b66bd2296910c9af34fe9487e1816c8cc 100644
--- a/Wetterstation/Form1.cs
+++ b/Wetterstation/Form1.cs
@@ -22,6 +22,7 @@ namespace Wetterstation
         Sensor node1In = new Sensor();
         Sensor node1Out = new Sensor();
         Sensor owm = new Sensor();
+        int tendenzCount = 10;
 
         public Hintergrund()
         {
@@ -245,7 +246,7 @@ 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; }));
+                    if (owm._temperatures.Count < tendenzCount && owm.tempTendenz() != -1) 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()); }));
                 }
@@ -253,7 +254,7 @@ namespace Wetterstation
                 {
                     lbLuftfeuchtAussen.Invoke(new Action(() => { lbLuftfeuchtAussen.Text = weatherData.humidity + " %"; }));
                     owm.Humiditys = (double)weatherData.humidity;
-                    if (owm._humiditys.Count < 10) lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Visible = false; }));
+                    if (owm._humiditys.Count < 10 && owm.humidityTendenz() != -1) lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Visible = false; }));
                     else lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Visible = true; }));
                     lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), owm.humidityTendenz()); }));
                 }
@@ -270,7 +271,7 @@ 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; }));
+                    if (owm._pressures.Count < tendenzCount && owm.pressureTendenz() != -1) 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()); }));
                 }
@@ -366,7 +367,7 @@ 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; }));
+                    if (node1In._temperatures.Count < tendenzCount && node1In.tempTendenz() != -1) 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()); }));
                 }
@@ -375,7 +376,7 @@ namespace Wetterstation
                     node1In.humidity = true;
                     lbLuftFeuchtInnen.Invoke(new Action(() => { lbLuftFeuchtInnen.Text = weatherData[0]["humidity"] + " %"; }));
                     node1Out.Humiditys = (double)weatherData[0]["humidity"];
-                    if (node1In._humiditys.Count < 10) lbTendenzHumidityIn.Invoke(new Action(() => { lbTendenzHumidityIn.Visible = false; }));
+                    if (node1In._humiditys.Count < tendenzCount && node1In.humidityTendenz() != -1) lbTendenzHumidityIn.Invoke(new Action(() => { lbTendenzHumidityIn.Visible = false; }));
                     else lbTendenzHumidityIn.Invoke(new Action(() => { lbTendenzHumidityIn.Visible = true; }));
                     lbTendenzHumidityIn.Invoke(new Action(() => { lbTendenzHumidityIn.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), node1In.humidityTendenz()); }));
                 }
@@ -384,7 +385,7 @@ 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; }));
+                    if (node1In._pressures.Count < tendenzCount && node1In.pressureTendenz() != -1) 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()); }));
                 }
@@ -399,7 +400,7 @@ 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; }));
+                    if (node1Out._temperatures.Count < tendenzCount && node1Out.tempTendenz() != -1) 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()); }));
                 }
@@ -408,7 +409,7 @@ namespace Wetterstation
                     node1Out.humidity = true;
                     lbLuftfeuchtAussen.Invoke(new Action(() => { lbLuftfeuchtAussen.Text = weatherData[0]["humidity"] + " %"; }));
                     node1Out.Humiditys = (double)weatherData[0]["humidity"];
-                    if (node1Out._humiditys.Count < 10) lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Visible = false; }));
+                    if (node1Out._humiditys.Count < tendenzCount && node1Out.humidityTendenz() != -1) lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Visible = false; }));
                     else lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Visible = true; }));
                     lbTendenzHumidityOut.Invoke(new Action(() => { lbTendenzHumidityOut.Image = RotateImage((Bitmap)global::Wetterstation.Properties.Resources.ResourceManager.GetObject("Tendenz"), node1Out.humidityTendenz()); }));
                 }
diff --git a/Wetterstation/Sensor.cs b/Wetterstation/Sensor.cs
index 5211358520a2dfb632be59e6663a7a242605edee..8fda3399f12938745387f1e2b19b0ac3eaeb67ab 100644
--- a/Wetterstation/Sensor.cs
+++ b/Wetterstation/Sensor.cs
@@ -24,7 +24,7 @@ namespace Wetterstation
         {
             set
             {
-                if (_temperatures.Count == 10)
+                if (_temperatures.Count == 3)
                 {
                     _temperatures.RemoveAt(0);
                 }
@@ -35,7 +35,7 @@ namespace Wetterstation
         {
             set
             {
-                if (_pressures.Count == 10)
+                if (_pressures.Count == 3)
                 {
                     _pressures.RemoveAt(0);
                 }
@@ -46,7 +46,7 @@ namespace Wetterstation
         {
             set
             {
-                if (_humiditys.Count == 10)
+                if (_humiditys.Count == 3)
                 {
                     _humiditys.RemoveAt(0);
                 }
@@ -57,15 +57,22 @@ namespace Wetterstation
         {
             int up = 0;
             int down = 0;
+            int same = 0;
             double oldTemp = 0;
 
             foreach (double temp in _temperatures)
             {
+                Console.WriteLine("--> tempTendenz " + oldTemp + " / " + temp);
                 if (temp > oldTemp)
                 {
                     up++;
                     oldTemp = temp;
                 }
+                else if (temp == oldTemp)
+                {
+                    same++;
+                    oldTemp = temp;
+                }
                 else
                 {
                     down++;
@@ -73,22 +80,30 @@ namespace Wetterstation
                 }
             }
 
-            if (up > down) return 180;
-            else return 0;
+            if (up > down && up > (same / 2)) return 180;
+            else if (down > up && down > (same / 2)) return 0;
+            else return -1;
         }
         public float pressureTendenz()
         {
             int up = 0;
             int down = 0;
+            int same = 0;
             double oldPressure = 0;
 
             foreach (double pressure in _pressures)
             {
+                Console.WriteLine("--> pressureTendenz " + oldPressure + " / " + pressure);
                 if (pressure > oldPressure)
                 {
                     up++;
                     oldPressure = pressure;
                 }
+                else if (pressure == oldPressure)
+                {
+                    same++;
+                    oldPressure = pressure;
+                }
                 else
                 {
                     down++;
@@ -96,22 +111,30 @@ namespace Wetterstation
                 }
             }
 
-            if (up > down) return 180;
-            else return 0;
+            if (up > down && up > (same / 2)) return 180;
+            else if (down > up && down > (same / 2)) return 0;
+            else return -1;
         }
         public float humidityTendenz()
         {
             int up = 0;
             int down = 0;
+            int same = 0;
             double oldHumidity = 0;
 
             foreach (double humidity in _humiditys)
             {
+                Console.WriteLine("--> humidityTendenz " + oldHumidity + " / " + humidity);
                 if (humidity > oldHumidity)
                 {
                     up++;
                     oldHumidity = humidity;
                 }
+                else if( humidity == oldHumidity)
+                {
+                    same++;
+                    oldHumidity = humidity;
+                }
                 else
                 {
                     down++;
@@ -119,8 +142,9 @@ namespace Wetterstation
                 }
             }
 
-            if (up > down) return 180;
-            else return 0;
+            if (up > down && up > (same / 2)) return 180;
+            else if (down > up && down > (same / 2)) return 0;
+            else return -1;
         }
     }
 }