No indicator is perfect and a trader must be prepared to take advantage of its strengths and know its weak points. With whatever indicator is used, a trader must be able to separate which is the real signal or voice and which is a signal diversion or noise. The positive side of Bollinger Bands, among others, is that it is very accurate with possible profit opportunities of up to around 70 percent. The downside is that this indicator tends to go against the trend so the risk is also not exactly small. For this reason, traders are advised to add other indicators such as the Oscillator, Parabolic SAR, EMA, Price Action, and ADX (Average Directional Index).