Just don't do it. You usually can't afford it to let the market come to see it your way. Get out and reenter. It's a lot cheaper that way. And if you don't believe me, trade Gold. This contract shows such great volatility, it does in 60min what other contracts need hours or days for. And his contract will teach you to respect it..or pay a lot higher price than you bargained for. I paid 2 weeks ago, and it has done my trading really good. I get emotional, I swear, I tell myself names...but I'm out, if it's not going my way.
