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[amibroker] backfill data of IB and realtime data of IB are different ?!?!



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can someone explain me why?
If I am connected to IB and receive the data on 1 min basis I get different data compared to the backfill data.

So if I tell Amibroker to backfill the data, the backfill data I receive is different to what Amibroker has in cache. I saw that if the the time of Amibroker is different to the TWS time (already if the time difference is less than 1 sec) the cache data is different to the backfill data. So candlesticks change their pattern and a Buy Signal could be no one?. Is this a problem of Amibroker, of IB? Does anyone know how to solve that problem? I recognized that if I reconnect to TWS the data gets backfilled every time? Is this a possible solution? On 1 min basis can I reconnect every 30 sec to receive proper backfill data?
Is this problem also existing, if I receive data from esignal?

Thanks, dubi



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