Bollinger Bands and the present trade

I love using Bollinger Bands. They are still partly a mystery to me, but the part that I do understand about them adds a huge bullet to my trading arsenal. Putting on and taking off positions based on retracement is great...and the 'Bands' help me quite well. In the case of the present Eur/Greenback trade, they don't because this thing is in a big downtrend (I hope!) and it has hugged the bottom band all the way down: