What is spot trading (Spot by CoinDCX)?

Updated 

Spot trade, also known as a spot transaction, refers to trading of cryptos for instant delivery/ exchange.
While using Spot by CoinDCX, you must have adequate balances in one currency to exchange for another. For example, depositing INR in order to exchange for BTC on the BTC/INR pair.
After executing a spot exchange between currencies, the balances are available to be exchanged again or withdrawn.