Hi Miles,
The answer to #1 is basically yes, 390 minutes per day.
The answer to #2 & #3 is not clear:
https://www.quantopian.com/posts/data-sources-backtesting-vs-live-trading
Quantopian gets the live feed from Nanex Nxcore but it is melded with data from another source, for the trailing window. But the melding has not been described in detail. And the other source has not been revealed.
Grant
Our support team will be in touch soon.
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