Quality of data prior to October 2017 is bad.
Almost all @ symbols.
@ENQ and @EP are only 17% and 3% good . They have missing bars, ticks and volume data.
It will be great if they can fix data quality, and also add bonds to it (ZN, ZF, ZT, ZB).
Alpari for example has 99% to 100% data quality for almost all its symbols.