On Friday after three spinning top days between 1.3250 and 1.3750 and trying to break through 1.3750, the bulls gave up. The market opened down 145 points and never looked back. The bears were now in control. The Dollar was strong and The Real was not weak and the weather in Brazil is not was not very favorable. But the forecast for several days out was favorable and the bears seized on it. Also, there was some profit taking after a 1,500 point rise.
I have attached a Dow Jones report which explains the decline further.