harveyd - the crossover you mention at the end of november is the green line crossing the red that is where you go long (you need to look at the direction hence the name directional movement indicator). With this indicator you look at the red moving upwards through the green that is negative and that didn't happen end of November (same as begining of August)? The green moving up through the red is bullish which is what you need to look for if you are going long. Next time I'll put arrows in.
At the end of the day the technicals are negative which doesn't mean it's actually going to happen but make the guessing more likely that it will. Anyway, so far it looks like a retracement which isn't anything to worry about just yet.