Enter the amount of money you would like to open a position with. The price will be executed at the market price
A limit order is an order to buy long or sell short at a specific price. A buy long limit order has to have a price under the current market price of the asset. Likewise, for a sell short position, a price is set and once that price is reached, the sell position opens.
A stop order is a more complex limit order. Breaking it down, we end up with a Trigger price and a standard limit order. The trigger price is the price that triggers the limit order.