There are bad votes about the quality of IB Backfill data. 1.) that there should a lot absence-ticks... 2.) or generally no Backfill What are your experiences,...? re 2.) From a thread of IB-API forum: IB responded offline that the requestHistoryData request will not return data from expired future contracts. IB provides 6 months of future data but only from the current contract. Is this still the fact, no data from expired future contracts? What are your experiences, there are a lot of third-party software which use the IB backfill/HistoricalData from IB, so the data should be not so bad? What about there should a lot absence-ticks...? Thank you very much for unswers!