...to reply to "3hoursdrive" (with thanks)
that statement of closing positions at their discretion is referred to the hard fork.
"If the hard fork results in a viable second cryptocurrency, we may create an equivalent position on client accounts to reflect this. However this action is at our absolute discretion, and we will have no obligation to do so. If, and when, the second cryptocurrency is tradeable on a major exchange, we will endeavour to represent that value. We’ll do this either by making the product available to close based on the valuation on that venue, or by booking a cash adjustment on client accounts. If, within a reasonable timeframe, the second currency does not become tradeable on major exchanges or is otherwise deemed not to be viable as a currency (for example, it is not mined), we may delete any positions that had previously been created at no value on client accounts. We will take steps to notify you when we have taken this action."