Within the context of trading, accumulation can have several meanings. When referring specifically to a traded asset, if there is an increase in buying activity, that asset is said to be “being accumulated.” When referring to trading, accumulation can also refer to a position size that increases over several transactions. It can even also refer to adding new positions into a portfolio as a whole.
We don't know everything about the markets. We're just devoted to learners. Taken from those smarter than ourselves, here's how we define Accumulation.