Bollinger Bands are one of the most effective technical analysis tools used by investors all over the world. Trading bands and envelopes ate used for the same purpose. They offer corresponding information about Hugh’s and lows that can be utilized to form various trading patterns. Bands can be categorized as very influential tool which can be used as a measure just like an average or a moving average. are usually thought of as employing a measure of central tendency as a base such as a moving average, whereas envelopes encompass the price structure without a clearly defined central focus, perhaps by reference to highs and lows, or via cyclic analysis.