Quote from: Super T on April 01, 2013, 08:17:49 PM

RANGE

Another feature of the contract format is the use of trading range controls, an upper and lower limit on each instrument beyond which trading cannot occur within the current (24hr) session. The range for the session is set during clearing as the latest trade price plus or minus 10%, so if the last trade price was 100 at clearing, the range for the following session will be set to 90 - 110.

This appears to be a safety feature to prevent exceptional price swings, and limits risk exposure to traders, however the rapid appreciation of bitcoin has on many occasions led to prices quickly reaching threshold levels, resulting at times in cessation of trade as no-one is prepared to sell within session range threshold.

This is patently false. The trading range SHOULD provide safety to the trader, but on multiple occasions the admin of the site has performed a 'manual clearing' that reset the prices so that trading could drop far below the 10% maximum in 24 hours. This happened due to market manipulation that drove the price down to 75 briefly from 94 (similar to what happened a couple days ago). The spot price quickly returned to normal, but the admin removed the trading range protection, and caused loss of many positions and forced margin selling on lot of traders. This has resulted in a great loss to many traders, who are still trying to get the admin to repay at least the considerable amount of fees that went into opening these positions that were unfairly closed.

This all happened BEFORE the admin added the arbitrary manual clearing clause to the futures description.