The bid/ask spreads are horrific. They haven't improved one iota since Nadex started. And you'll notice that in the last minute of trading, you can be on the winning side of the trade but can't get out because the bid/ask gets dropped out so you can even lose on a pre-expiry exit from a winning position. If you don't have a 75%+ avg winning pct, it's a killing field. Trading the e-minis is a walk in the park compared to binary options.
75% is not a must. you can lose money even you win 95% trades. just like another guy said he made 30 times in a hour and lost more later. psychology plays more important role. the spread is set by market makers and other traders on Nadex. Nadex only make money on commission.
Here is how it works (or doesn't work). And, aren't vendors supposed to pay for advertising? https://www.elitetrader.com/et/help/terms
Nadex ... Note that pursuant to the Nadex Membership Agreement, “You may not give control over Your account to any other person or entity and You may not control the account of any other Member." You ... We now provide the Nadex managed account service for Nadex investors. Fund is in your own nadex account, you do deposit and withdraw; we only do the trading work. Clear violation of Nadex agreement.