Switch between Isolated and Cross margin modes. Cross margin uses your entire wallet balance to avoid liquidation.
Amount can be in terms of units of an asset (e.g. 1 BTC) or total dollar amount invested (e.g. BTC worth $100)
Wether you are going Long or Short on the trade. Long means you are betting the price will go up, Short means you are betting the price will go down.
Trades are remembered when switching b/w Spot and Futures calculators until the page is reloaded