The term sell wall refers to a very large limit sell order or a cumulation of sell orders at one price level on an order book. It is the opposite of a buy wall, which refers to a large buy order or a cumulation of buy orders at one price level. 

Trading volume, is the number of units traded in a market during a given time. It is a measurement of the number of individual units of an asset that changed hands during that period

Transactions per second (TPS) is a measurement of computer software and hardware that represents the number of transactions completed in one second by an information system.

Segregated Witness is an update (Hard Fork) proposed for the Bitcoin software, which is designed to fix various serious problems.

HODL is a term commonly used by cryptocurrency investors who refuse to sell their cryptocurrency regardless of an increase or decrease in price.

The term hash rate refers to the speed at which a computer is able to perform hashing computations.

Dollar Cost Averaging or abbreviated as (DCA) is an investment strategy, where the goal is to minimize the impact of volatility when investing or when trading.

Hash is a mathematical algorithm that functions to convert input values ??of various sizes into outputs (hashes) with a fixed size.

Liquidity in the term is used to define the ability to sell or buy an asset without causing a major impact on the market price.