If you look at "Today's Trades...." by gwr at 4:20 pm, it indicates that no trades were made at $0.78 today (all trades were above your buy price), so your order expired. As was indicated in earlier posts, there were shenanigans going on at the bell.

Try again Monday, noting the bid/ask before the opening. Maybe have a longer expiration date if you really want it at that price, and just want to forget about it.

lb