I want to be able to plot the difference between the nyse up volume and down volume. I use Interactive brokers data feed. I know that esignal has a symbol for this. I dont see a symbol for this on the IB sites, so I was wondering if there is a way to create it with NT, since the up volume and down volume are availabe from IB. Is there a way to get the data from IB and then plot the difference of two symbols?
Thanks
Max
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