Also, say I have a short position already open and decide to open another short. There is no need to tick Force Open. However, in error, instead of sell I press on Buy, that is, going Long. Small handheld device or even on a computer, a momentary confusion... easy to touch the wrong button.
Then not only would I have a wrong trade, but that would have closed another trade.
As I said, Force Open is a trap. Whoever developed it did so with the intention to cause loss for traders, not for neting off. It is not fit for purpose and if one was to take it further, IG will surely lose a legal c