The longer-term charts should always be your first 'port of call' when considering if a market like OJ is about to bottom, IMO.
A trader should never be fooled into thinking prices cannot go any lower, merely because they are at multi-year lows.
Also, as prices tend to move in proportion (most of the time), wouldn't a multi-week basing phase be probable after such a sustained downtrend? Markets take time to re-adjust.
Do some creative Technical Analysis on monthly, weekly and daily charts.
Look at the bigger fundamental picture - If you follow USDA supply/demand tables, production in Florida is forecast to be equal to last year's record crop. Brazil seems plentiful also. (Problems there could arise, however.)
On my Weekly OJ chart attached, I've overlaid 13-week and 26-week moving averages. The 13-week MA clearly defines the overall trend and acts as dynamic resitance (OR SUPPORT FOR THE DOWNTREND)
I've also incuded MACD (8,17,19) which does show bullish divergence and a crossover.
Finally, a VERY SLOW STOCHASTIC (4,21,42) gives confirmation of the bullish divergence, but NOTE that %D (RED) has not been decisively crossed (to the UPSIDE) since the downtrend began in early 2003.
In short (no pun intended) there is not enough evidence to suggest a new trend as yet. The bullish momentum divergence could be the first sign, but until the long-term MA's are breached, that might just signal another temporary correction upwards.
All IMHO.
See weekly OJ chart attatched.