The Accumulation Area refers to the duration in which an institutional buyer is buying. It is actually a buying duration of a buyer. The price remains constant in this duration.
The price chart explains accumulation area as sideways price action with above-average volume.
It represents that large institutional traders buy or accumulate an asset in a large quantity a specific duration.
Accumulation area plays a vital role for traders while deciding about selling or buying
Accumulation Area helps in recognizing the best entry points before the price is about to increase.
Accumulation Area hints more breakout possibilities.
The breakout will be resultantly goes up soon when price level remains constant in a sideways range for an extended duration. In this way it can be assumed that an institutional buyer is accumulating asset. 
Distribution area is the opposite side of accumulation area.
The distribution area Is that point where selling is started by institutional traders.
It’s too critical for trading achievements to know whether an asset is in the accumulation zone or the distribution zone.
The goal is to buy in the accumulation area and sell in the distribution area.