What happens if price doesn't change? It doesn't happen often but I definitely have had trades end on exactly the same pip/price. Most fiat based binary option brokers give back 100% of the trade if this happens but none of the other btc based BA dealers do.
There are some reasons, we're discussing this internally.
The only thing I don't like about this site is it doesn't have an option to deposit to an account be it anonymous or not. Balances would be a lot easier as someone else said the delay between sending btc and the bet actually being placed can be an issue. Well that and the chart is tiny and doesn't show any significant amount of time.
We made no account because a lot of people afraid of their money being stolen, like with many other hacked services. We don't want to scary people with any kind of security issues.