Working OFFLINE, I can build (after reading the help section) a nice 30min bars chart with 6 months of data behind it. The next morning, I connect to IB to get real-time data for the front month contract and...
it overwrites the previous data I merged into it!!
How can I avoid overwriting? How can I tell the chart to update real time FROM today and leave yesterday untouched?
Any help welcome!!
Juan Rivera
Comment