Is it a day trade a swing trade for example.

The best advice I can give with the lack of knowledge of the style of trade you have, is if you are unsure, slice a third of the trade to bag some profit and then position your stops to protect the rest, either at entry or in profit at apoint that suits you and the charts.

The other way is to use say a weekly option spread bet where they can be purchased for the minimum down here. so the loss is miniscule but protects your trade if it reverses by paying out.