The idea of this indicator has been proposed by Bill Williams in his book "New Trading Dimensions: How to Profit from Chaos in Stocks, Bonds and Commodities".
It shows the "fourth dimension" of the market - it paints the bar charts with different colors (green, grey and red) depending on the current market momentum (1st derivative) and price acceleration (2nd derivative), which calculated by Awesome Oscillator (AO) и Accelerator Oscillator (AC).
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/17
The Bears Power Indicator measures the balance of the bears strength.Bollinger Bands ®
The Bollinger Bands ® Indicator (BB) is similar to Envelopes. The only difference is that the bands of Envelopes are plotted a fixed distance (%) away from the moving average, while the Bollinger Bands are plotted a certain number of standard deviations away from it.