Lots of complaints.
Their price currently is at 9.43$ for barrel, while true WTI CFD price is 26$ for barrel, it can be checked with any other broker, or simply by looking at CME futures prices for WTI, all contracts are above 25$ for barrel. Tickmill have applied close only mode on WTI, and since I have 3 long positions I am not able to close my positions with significant profit of 26 000$, and trader can not open new long positions on that absurd, fake, low price they offer.
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