I use the N225 off Simex (NI Z3-SI) and it collects data in GS and plots charts fine. One thing i have noticed over the years, and this is a problem with TradeStation, is it doesn't always handle multiple session times very well when it comes to plotting a chart.
Try using 1 session for each day and see if it plots a chart.
I have seen this problem in TS regardless of data supplier.
Drinks are on me when your in Houston (or Stockholm )...that's perfect - got my chart minus the electronic session, but at least I know what the bug is....
and yes I had read about the chart refresh every tick syndrome...thankfully have avoided it for the most part...
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