Thank you for your reply,
It is unclear to me how to make the blaze data feed into a "live" one (which could then push data as needed).
What about adding a moc-strategy in cerebro, and this strategy would block the process until an external signal would free it, making cerebro cycle once through the actual strategies and being blocked again as it enters the moc-strategy.
But I would prefer making a "live" datafeed. The documentation doesn't explain how to make one. If I had a clue I could start modifying the blaze datafeed accordingly.