Hi. I have developed a strategy, which I have tested with Amibroker using historical data from yahoo. Now I want to test it in real conditions, so I would like to open some kind of free demo account. I think the best option is trough IB API, but the matter is that IB requires to open a real account before give me a demo account. Somebody knows about some free option? Thanks.
Try: http://clearstation.etrade.com/ Simulationed commissions are E*TRADE rates however, not IB's nice rates. But they do have a simulated trading feature once you register.
If you open a demo account you won't be able to test in "real conditions". To test it in real conditions, you need to open a real account, and you can trade very small size if you want (1 share per position), but it needs to be a real account with real money.
First paper trade - then test with very little money and gradually increase amount - IF profitable. Very stupid to trade with real money, if even paper trading not profitable IMO.