sounds like you have really looked at it all thoroughly and if all those options are there, it seems to be well covered..
there are some other stuff out there... sometimes just comparison charts...sometimes spreads like mentioned by others..brite, moore..
... for that matter, trades posts some of the best charts when asked...great service, haha..... and stimpy covers spreads well in his newsletters as he linked in his post but uses a paid service for his charting programs so yours will be a great addition to the trading world.....(besides his own newsletter, stimpy is the one doing the grains newsletter for the minneapolis exchange ...)

for me, i will just be happy if your set up will show a real 1:1 nob differential as none of the others do that correctly... and they didn't fix it when i informed them of their wrong setup...so i haven't been back to them,..... so i stil do it by hand...haha..
for calendars... old crop new crop is the obvious..
look forward to your further news on your progress.
all the best, j