diff --git a/GChartView.cpp b/GChartView.cpp
index db59013..f31b773 100644
--- a/GChartView.cpp
+++ b/GChartView.cpp
@@ -31,7 +31,6 @@ GChartView::~GChartView() {
 }
 
 void GChartView::wheelEvent(QWheelEvent *event) {
-    auto pixels = event->pixelDelta();
     auto degrees = event->angleDelta();
     auto cursor_y = event->position().y();
     auto cur_range_max = axis_y->max();
@@ -45,7 +44,7 @@ void GChartView::wheelEvent(QWheelEvent *event) {
     if (cursor_y < pos_max && cursor_y > pos_min) {
         center = chart->mapToValue(QPointF(0, cursor_y)).y();
         auto cur_range = (cur_range_max - cur_range_min);
-        if (pixels.y() > 0)
+        if (degrees.y() > 0)
             new_range = cur_range * 0.8;
         else
             new_range = cur_range / 0.8;
@@ -59,12 +58,12 @@ void GChartView::wheelEvent(QWheelEvent *event) {
     }
     if (new_min < -2.5) {
         new_max += (-2.5 - new_min);
-        new_min = 2.5;
+        new_min = -2.5;
         new_max = new_max > 2.5 ? 2.5 : new_max;
     }
 
     axis_y->setRange(new_min, new_max);
-    qDebug() << new_min << " " << new_max;
+    qDebug() << "new_min:  " << new_min << " " << new_max;
 
 
 }