s1.add(new Year(2006), 1.0, 1.1, 1.2, 1.3);
c1.addSeries(s1);
assertFalse(c1.equals(c2));
OHLCSeries s2 = new OHLCSeries("Series");
s2.add(new Year(2006), 1.0, 1.1, 1.2, 1.3);
c2.addSeries(s2);
assertTrue(c1.equals(c2));
// add an empty series
c1.addSeries(new OHLCSeries("Empty Series"));
assertFalse(c1.equals(c2));