look for trend that move the price move opposite.. if there were a fundamental close to your trading time, you can cut loss and open position as the price moving.. switch trade tho the opposite position.. thats if it is a trend movement.. if it is a sideway, there are so many technic to do some martingale or averaging, to minimize loss, but maximize profit.. it just depends on the movement wether its a trend or sideway..
and if your balance is good, just sit back and let it flow even floating minus.. someday the price will back..