Starting out in Forex. Zoe Fiddes, Head of Sales at ORE.com comments. So when you start in the forex markets there are some central themes that you need to understand like the deal size that you’re trading, the extent of margin you are using and where you intend to use the stop loss. The next thing is that traders often only consider market direction but they forget about volatility because a trade might move from one point to another during a trading day but between those points it can go hugely up or down. If you haven’t considered the volatility, how can you have any idea where to place the stop loss order. If you know that the market is likely to be more volatile, then you might want to use a smaller stake size or use a wider stop loss.