// Configure the y-axis with a 10pts Arial Bold axis title
c.yAxis().setTitle("Price (USD)", "Arial Bold", 10);
// Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15
// pixels between minor ticks. This shows more minor grid lines on the chart.
c.xAxis().setTickDensity(75, 15);
// Set the axes width to 2 pixels
c.xAxis().setWidth(2);
c.yAxis().setWidth(2);