Add Plot

Here is the `plot_graph()` that is in char of the bars, scatter and vertical line plot items.

Also all the necessary code  for the graph to be shown.

examples/max_pain.py

@@ -141,10 +141,10 @@ async def max_pain_daemon(
         vertical_line = InfiniteLine(
             pos=max_pain,
             angle=90,
-            pen=pg.mkPen(color='yellow', width=2, style=QtCore.Qt.PenStyle.DotLine),
+            pen=pg.mkPen(color='yellow', width=1, style=QtCore.Qt.PenStyle.DotLine),
             label=f'Max pain: {max_pain:,.0f}',
             labelOpts={
-                'position': 0.8,
+                'position': 0.85,
                 'color': 'yellow',
                 'movable': True
             }
@@ -216,8 +216,8 @@ async def max_pain_daemon(
                     print('-----------------------------------------------')
                     print(f'timestamp:             {datetime.fromtimestamp(max_pain['timestamp'])}')
                     print(f'expiry_date:           {max_pain['expiry_date']}')
-                    print(f'max_pain:              {max_pain['max_pain']}')
+                    print(f'max_pain:              {max_pain['max_pain']:,.0f}')
-                    print(f'total intrinsic value: {max_pain['total_intrinsic_value']}')
+                    print(f'total intrinsic value: {max_pain['total_intrinsic_value']:,.0f}')
                     print('-----------------------------------------------')
 
             # Process GUI events to keep the window responsive