Bollinger Bands
Bollinger bands will help you to predict big trending moves, act on big trend reversals and finally, time trading positions with greater accuracy for bigger profits.
Here we have related Bollinger bands to the currency markets (as it is here that they are most useful) - but they are useful in all financial markets.
What are Bollinger Bands?
Developed by John Bollinger, Bollinger bands are volatility bands drawn around a simple moving average.
You calculate Bollinger bands using the standard deviation of price over the same period as moving averages and plotted as lines above and below the moving average.
As moving averages have been traditionally used to identify the underlying trend, Bollinger bands combine this with the volatility of the individual market (or the standard deviation)