A Market Order is an order of the execution of a trade; either buy or sell, at the best available price.
Such limits are called Stop Loss and Take Profit.
A Stop Loss is the limit that the client chooses below the rate at which he buys or above the rate at which he sells. This will automatically close the transaction from the system in order to minimize any losses.
A Take Profit is the limit that the client chooses above the rate at which he buys or below the rate at which he sells. This will automatically close the transaction from the system in order to get the desired profits.
Almost all traders are working with these limits which work as a reassurance that the transaction is being taken care of by the system/broker.
Contract size (Lot): 1.00 Lot (100,000 EUR)
Currency Pair: EUR/USD
Margin 1%: 1,000 EUR
Take Profit: 1.4100
Buying Rate: 1.4041
Stop Loss: 1.3950
If the leverage is 1:100; we buy EUR/USD with 1.0 lot size which equals to 100,000 EUR. The margin requirement is at 1%; therefore, we have a 1,000 EUR margin requirement.
As you can see, the buying rate is 1.4041 (which is the rate we entered the market with). The Stop Loss Rate is at 1.3990 and the Take profit rate is at 1.4100. Therefore, you are willing to lose 91 pips to gain 59 pips.
Using the calculated formula, for EUR/USD currency pair the USD value per pip on a 100,000 lot size is $10.
So, the maximum you can lose with your Stop Loss is 910 USD (91x10), and the maximum you can gain with your Take Profit is 590 USD (59x10).
Remember, once your trade is closed to 1,000 EUR margin, it will be returned to your account.