There is a difference between futures and spot trading. Opening a spot wallet position can either be with a limit order or a market order. These types of orders are the most common positions when opening a trade.
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Trading in a spot wallet includes that you own an x amount of coins. With futures trading people enter into a contract to buy or sell an asset at a specified price on a future date. This allows traders to speculate on the future price movements of an asset whiteout owning it.