Hi Alex,
I too have the same problem as you have in FChart-SE (I know you are having pro version). The 30 min chart do not display correctly. Look at the x-axis you will have repeat of times like 11.00, 11.00, 11.30, 11.30 etc. I am using this sw for intraday charts of bse scrips.
Sorry to interrupt this thread. Will delete after alex notices this post.
Regards