Is there a published, or going to be published interface for accessing real-time balance information for Fidelity customers?

It would be nice to have feedback about current positions and balances.

Please ask Fidelity. We had to remove API docs at all.

A nice feature might be... "make the equities in account xxxx into a data manager collection".
This could be a "Smart List" that updates dynamically for the positions in your live account portfolio.

Or "make a paper portfolio of account xxxx" and then one could potentially write/backtest a portfolio management script using simulated positions/balances of your real account.

If Fidelity does not want to expose the API to wealthscript, these could be options under the Portfolio/Position Sizing settings and a Smart List, as I described above.

The existing APIs are exposed (you can't have an interface without exposing it); it's just that their documentation is in review. Nonetheless, accessing account balances isn't there and isn't planned. (But a little bird told me that Paper Trading is coming down the road.)

Is any way we access the local trade history of a live account or local order list of a live account from a strategy?

I guess that orders and historical trades can be accessed by parsing Orders.xml/TradeHistory.xml in WLP's Data directory respectively.

Thanks, Eugene.

I found these files. If I write an intraday strategy ( 5min) to monitor my positions in a live account using historical trades that will be updated constantly, does it sound?

Frankly speaking, no idea. This is not documented, and therefore, is unsupported.