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It always returns with the exception: java.lang.IllegalArgumentException: Requires 'lower' < 'upper'.

How can I solve it? Thx a lot!!

so how can I use mutilple datasets on the same chart? As I used ChartFactory to create a timeseries chart and it accepts only ONE dataset/TimeSeriesCollection with multiple TimeSeries You will have to create the plot manually (see the API for XYPlot ). XYPlot plot = new XYPlot(); // two datasets an...

Actually, this is a bug in the XYDifferenceRenderer algorithm I introduced when I rewrote the algorithm to make it more flexible. The XYDifferenceRenderer should only accept one or two series. A greater number of series than two does not make sense for the renderer because you cannot intuitively di...

I created a Bollinger bands by retrieving data from database. Therefore, in a chart I hv a upper band and a lower band. In between I plotted the stock price of a particular stock. Totally three time series. The problem is that when I use XYDifferenceRenderer to color the area bounded by two series, ...

Plz help me~~~ thx!!

public class LineChart { TimeSeries ts; TimeSeriesCollection tsCollection; XYDataset xydataset, rsiSeries; StandardXYItemRenderer xyRenderer = new StandardXYItemRenderer(); StandardXYItemRenderer rsiRenderer = new StandardXYItemRenderer(); DateAxis xAxis; NumberAxis yAxis; XYPlot plot1, plot2; publ...

hmm...I never use XYDataset...
maybe I'll try it later...

I created my line chart as shown below: ts = new TimeSeries("Stock", Minute.class); And I created the 10-day moving average as below: TimeSeries ma10 = MovingAverage.createMovingAverage(ts, "10 day", 14400, 0); 14400 is the no. of minutes in 10 days It seems the graph is correct. Please notify me if...

I used ohlcSeries to draw the candlestick chart but I can't update the datasets. So, how to update the datasets of candlestick chart? For another Line chart. I used TimeSeries to draw. There is a method AddOrUpdate() to update the dataset and I can also remove the timeseries by clear() whether there...