diff --git a/README.md b/README.md
index a0674b4..23950bb 100644
--- a/README.md
+++ b/README.md
@@ -10,10 +10,10 @@ make -j4
 
 ## Usage
 ### Example scanning the FM radio band
-`soapy_power -f 80M:110M -n 10 -e 30 -B 30k -k 30 --pow2 -F rtl_power -R | ./Livepow`
+`soapy_power -f 80M:110M -n 10 -e 30 -B 30k -k 30 --pow2 -F rtl_power -R | ./LivePow`
 
 ### Example loading the data in the file scan.csv
-`./Livepow scan.csv`
+`./LivePow scan.csv`
 
 ### Example reading from scan.csv using the palette from palette.png while skipping the first 22 lines
 `./LivePow -p palette.png -s 22 scan.csv`
diff --git a/displayarea.cpp b/displayarea.cpp
index 64b2053..9b48423 100644
--- a/displayarea.cpp
+++ b/displayarea.cpp
@@ -19,6 +19,12 @@ void DisplayArea::paintEvent(QPaintEvent *event)
     painter.drawImage(rect,image,rect);
 }
 
+bool DisplayArea::pixelSet(int x, int y)
+{
+    if(x>image.width()||y>image.height()) return false;
+    return qAlpha(image.pixel(x,y))==255;
+}
+
 void DisplayArea::setPixel(int x, int y, unsigned int col)
 {
     if(x>=image.width()||y>=image.height()) resizeImage(&image,QSize(qMax(x+255,image.width()),qMax(y+255,image.height())));
@@ -55,7 +61,8 @@ void DisplayArea::updateColorMap(float oldMin, float oldMax, float newMin, float
         QRgb currentColor=imagePixels[i];
         if(qAlpha(currentColor)==0) continue;
         unsigned long oldIndex=findPaletteIndex(currentColor,palettePixels,size);
-        QRgb newColor=palettePixels[remap(oldIndex,oldMin,oldMax,newMin,newMax)];
+        unsigned long newIndex=remap(oldIndex,oldMin,oldMax,newMin,newMax);
+        QRgb newColor=palettePixels[newIndex];
         imagePixels[i]=newColor;
     }
 }
diff --git a/displayarea.h b/displayarea.h
index 4ed67ae..3d51db9 100644
--- a/displayarea.h
+++ b/displayarea.h
@@ -11,6 +11,7 @@ public:
     void setPixel(int x,int y,unsigned int col);
     bool saveImage(const QString &fileName, const char *fileFormat);
     void updateColorMap(float oldMin,float oldMax,float newMin,float newMax,QImage palette);
+    bool pixelSet(int x,int y);
 
 protected:
     void paintEvent(QPaintEvent *event) override;
diff --git a/inputparser.cpp b/inputparser.cpp
index 1adee2a..886c7fb 100644
--- a/inputparser.cpp
+++ b/inputparser.cpp
@@ -58,18 +58,14 @@ void InputParser::process()
             decimal=false;
         break;
         case '\n':
-            index=0;
             minFreq=qMin(minFreq,currentLine.minFreq);
             maxFreq=qMax(maxFreq,currentLine.maxFreq);
 
             sendPixel();
 
-            if(currentLine.maxFreq<=lastMaxFreq){
-                currentY++;
-                currentX=0;
-            }
             lastMaxFreq=currentLine.maxFreq;
 
+            index=0;
             nbOfLinesParsed++;
             currentLine=line();
             decimal=false;
@@ -159,7 +155,12 @@ void InputParser::sendPixel()
     QRgb color;
     double normCol=(currentPowerValue-minPow)/(maxPow-minPow);
     QRgb* palettePixels=(QRgb*)palette.bits();
-    color=palettePixels[qRound(palette.sizeInBytes()/sizeof(QRgb)*normCol)];
+    unsigned long paletteIndex=qRound(palette.sizeInBytes()/sizeof(QRgb)*normCol);
+    color=palettePixels[paletteIndex];
+
+    currentX=(currentLine.minFreq-minFreq)/currentLine.freqStep+(index-5);
+
+    if(display->pixelSet(currentX,currentY)) currentY++;
 
     display->setPixel(currentX,currentY,color);
     currentX++;
diff --git a/inputparser.h b/inputparser.h
index b61c525..cf42b1d 100644
--- a/inputparser.h
+++ b/inputparser.h
@@ -32,7 +32,7 @@ private:
     unsigned long maxFreq=0;
 
     float minPow=__FLT_MAX__;
-    float maxPow=0;
+    float maxPow=-__FLT_MAX__;
 
     unsigned long lastMaxFreq=0;