Spread is basically the difference between the ‘Buy’ Price and the ‘Sell’ Price.
When a trader opens a trade at a specific price, he/she will be immediately in a losing position.
This is due to the Spread.
Buy Price: ASK Price
Sell Price: BID Price
Even on real money exchange, where you intend to Give 1,000 EUR to get the equivalent amount in USD, you must pay the Spread.
This is clearly visible, by trying a second later, to exchange the USD amount back to EUR.
You will realize that the amount you will get back from the exchange, is definitely less than 1,000.
With Skilling, you can enjoy very competitive Spreads and more information can be found here, choose any Symbol -> more details