I'd say it was pinned limit up on open and didn't move the rest of the day. Pinned at limit up with no move down during the day to make a traditional stick. The open, high, low, and close were all the same...locked limit up.
Don't know why my charts won't build a candle chart for these commodities. It won't even make a proper OHLC chart...all the sticks are green with the OHLC style??? Don't know what's up with that.