//init with any size, autolayout
_chartView = [[BBChartView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];

//ChartView add area, area add series
Area* areaup = [[Area alloc] init];
Area* areadown = [[Area alloc] init];
BarSeries* bar = [[BarSeries alloc] init];
StockSeries* stock = [[StockSeries alloc] init];
[areaup addSeries:stock];
[areadown addSeries:bar];

// add data to bar and stock
// [stock addPoint:]
[self.chartView addArea:areaup];
[self.chartView addArea:areadown];
// two area's height ratio
[self.chartView setHeighRatio:0.3 forArea:areadown];

// set any color you like
[BBTheme theme].barBorderColor = [UIColor clearColor];
[BBTheme theme].xAxisFontSize = 11;

// begin to show the view animated
[self.chartView drawAnimated:YES];