Where can one get open, high,low, close for a specific stock option on a specific trading day. For example: where did DIA May 128 calls trade on 5-15-08. Is there a website that provides that? Also, does anyone create charts from the O, H, L, C of these options instead of looking at charts of the underlying stock? Thanks!
Tradestation charts options just like the underlying security. If you don't have charts, you can't know the premium, so it is handy to have. Many others offer it as well.