Hey,
I’d recommend creating a demo account with Nadex so you can open a Binary ticket and play with different values to see how things change but Darrel has loads of videos on binaries that would be a big help as well, That said…
Yes, the value of the contract is shown by the Bid and Offer prices. In the ticket above the bid is priced at $20.50 and the offer is priced at $33.
So if you entered a position for 1 contract at the offer price of $33, that’s how much it would cost you to enter the trade. Therefore 50 contracts at $33 each would be a value of $1650. That’s your cost to enter and also your potential max loss.
Your profit though would be based on the difference between your entry at $33 and the price you sold at. If you held to expiry and were correct then the profit would be the max payout of $100 minus $33 equaling a profit of $67 per contract. So on a 50 contract position your potential max profit would be $3,350.
Hopefully that addresses your question and again, I’d totally recommend viewing the videos created by Apex and opening a demo account. Never having taken on 50 contracts in my life I couldn’t speak to liquidity issues. haha.
Demo trade until your comfortable and watch the videos.
Jack.