Bollinger Bands Signal Indicator  zoom green»  zoom red» Using the Bollinger Bands as a signal indicator for a change in trend is done by looking for either a construction of the two outer bands or a widening of the two outer bands. A handy hint for utilizing the Bollinger Bands is to monitor the price for an extended movement towards the outside bands. Including a trend line on the opposite side of the band, then waiting for the price to break the trend line can be an excellent signal for a reversal of trend. By Using Markets-Alert this trend break can be immediately signalled to the device of your choice. Formula: Upper Band: mov( C,20,S ) + ( 2 * (std( C,20 ))) Lower Band: mov( C,20,S (- (2 * std( C,20 ))) Middle Band: mov( C,20,S ) Hint: Click on the arrows. Click Here to Enlarge »  Back to the Learning Center Home Page »