Option example: Selling 1 put for $1.50 premium would be an amount of $150 credit.
Stock example: Buying 10 shares of a $100 stock would be an amount of $10,000 debit.
For futures: Futures transactions don't actually initiate a debit or credit effect on cash, so instead, the Amount is set to the Notional Value of the futures contracts. Example: Buying 2 /ES contracts at 2,800 would show an amount of $280,000 debit. The multiplier is 50, so each /ES contract represents $140,000 in notional. Buying 2 of them will bring the total to $280,000 debit.