Random article: Chaikin Oscillator
It is commonly known that the concept of Accumulation /Distribution indicator is contained in the theory stating that force of pressure of purchasers or vendors can be calculated in relation to Close price to High and Low of a respective time period. In other words, it can be stated that when price closes in the upper half of trade range (distance between High and Low), purchasers dominate on the market, or when price closes in the bottom half of trade range, there is a pressure from the side of vendors.