Notional

The notional value refers the total value of the derivative contract it holds and calculated by multiplying the total number of units that are there in the contract with the spot price of the said units prevailing in the market.

Notional Value = Total Units in the Contract * Spot Price

For example,

Ticker	Index Price	USD (24h Volume)	Notional (24h Volume)
BTCUSDT	$20,000	$14,000,000,000	700,000
ETHUSDT	$1,000	$5,000,000,000	500,000,000