This sounds quite a bit like what Jason mentioned early on in the thread as not being a good idea - using hedging as a kind of temporary stop. In other words, you worry that the trend you're playing has ended, but you don't want to just exit the position because the market might turn back around.
Basically, it's two fears in one: a) Fear of giving back your gains, and b) fear of missing out.
The problem here is that putting on the hedge position freezes your account in position just as if you'd exited the trade. If you then take the hedge off at a profit (retracement has continued) then it's just like putting the original trend trade back on again at that point.
That's the perfect outcome.
The less perfect ones are:
1) The market keeps going against your initial and you eventually have to close it out. At this point you need to decide whether to keep on the hedge position, which essentially is the same as making a new trade. Because you've had both the long and short on up to this point you won't have made any net profit, and because you put on the second trade you've had to pay an extra spread.
2) The market reverses back in the direction of your original trade to the point where it puts your hedge position in a loss. This means you've missed out on some of the original trend because you were effectively net flat. Plus you had to pay an extra spread for putting on the hedge.
If the hedge position is entered based on a separate strategy from the one you're using for your longer term trade, fine. If, however, you're looking to use it to manage your longer term position it is not going to provide any net benefit. In fact, it will almost certainly cost you money.
The better way to go is to refine your exit strategy.