Read about the Bollinger Bands Trader indicator here.
Main idea from the above is that a temporary correction against the US Dollar is expected following its strength.
EURUSD :has bounced after hitting the bottom BB level and is slightly moving up, possibly as a correction since the pair is moving lower. We can see the Bounce position to increase slightly during the last 3 periods and so does its volatility.
GBPUSD: has been showing an increased volatility as the pair has been moving lower and lower as it has been constantly under the lower Bollinger Band without a bounce having occurred yet. This could mean the pair could penetrate the lower band again and move lower.
USDCHF: has been moving higher and higher as shown by the increased volatility in the size of the bands length , and the position being above the 100% top band. It is expected that a bounce will occur now and the pair will move lower.