One trade Its basically a widget based manual web trader.You can trade manually without having to download and install any trading platfrom ,also you can trade on the web on any computer or mobile device ,And you can create as many demo trading accounts with a performance page created automatically.
By using this service the Brokers often offer demo accounts with a time limit, i.e. 2 weeks this way they can urge you to open a live account with them quickly.I do prefer OneTrade simply because its free, unlimited and its user friendly, But i cant trade live on here without going through a broker.