Hi all, It's too difficult to reinvent the whole wheel. So I have to stick with IB TWS although it has so many drawbacks. One thing I am looking for is to be able to do some algebraic operations on the plots. Say you plot the price as one curve in IB, and you also plot the volume as another curve in IB TWS. It should be very easy to plot Price/Volume, or Price * Volume ( I am just giving some examples here). But IB TWS does have this in mind they designed the software. Any thoughts about how I can extend TWS to do the plots? Of course, we can start from scratch, and do the whole C++/Java programming thing using IB API, but that's really a daunting task and too much reinventing the whole wheel. Any thoughts?